Common Weakness Enumeration
CWE-79
AllowedImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Abstraction: Base · Status: Stable
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
71571 vulnerabilities reference this CWE, most recent first.
CVE-2026-53579 (GCVE-0-2026-53579)
Vulnerability from cvelistv5 – Published: 2026-08-27 19:33 – Updated: 2026-08-28 15:58
VLAI
EPSS
VEX
Title
Trilium: Note Import to RCE via Book Note
Summary
Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML, allowing an attacker-supplied import archive to embed a payload that executes as script. A book note's content is routed through the same rendering path as text notes and injected into the page with jQuery's html method when the note is shown as a grid-view preview card, so a malicious note survives Safe import and runs as soon as the victim opens the containing note. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim's machine. This issue is fixed in version 0.104.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:45 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/TriliumNext/Trilium/security/a… | x_refsource_CONFIRM |
| https://github.com/TriliumNext/Trilium/commit/abb… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TriliumNext | Trilium |
Affected:
< 0.104.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53579",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-28T15:45:50.749040Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-28T15:58:18.142Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Trilium",
"vendor": "TriliumNext",
"versions": [
{
"status": "affected",
"version": "\u003c 0.104.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on \"Safe import\" filter sanitizes HTML only for text notes and excludes the book note type, whose content is stored without sanitization and later rendered as HTML, allowing an attacker-supplied import archive to embed a payload that executes as script. A book note\u0027s content is routed through the same rendering path as text notes and injected into the page with jQuery\u0027s html method when the note is shown as a grid-view preview card, so a malicious note survives Safe import and runs as soon as the victim opens the containing note. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim\u0027s machine. This issue is fixed in version 0.104.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "ACTIVE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T19:33:24.490Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/TriliumNext/Trilium/security/advisories/GHSA-h7w4-cjfg-cvj8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/TriliumNext/Trilium/security/advisories/GHSA-h7w4-cjfg-cvj8"
},
{
"name": "https://github.com/TriliumNext/Trilium/commit/abb01f09b3ad7792bd3d42a973730c99a062a808",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/TriliumNext/Trilium/commit/abb01f09b3ad7792bd3d42a973730c99a062a808"
}
],
"source": {
"advisory": "GHSA-h7w4-cjfg-cvj8",
"discovery": "UNKNOWN"
},
"title": "Trilium: Note Import to RCE via Book Note"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53579",
"datePublished": "2026-08-27T19:33:24.490Z",
"dateReserved": "2026-06-09T19:11:53.484Z",
"dateUpdated": "2026-08-28T15:58:18.142Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53578 (GCVE-0-2026-53578)
Vulnerability from cvelistv5 – Published: 2026-08-27 19:21 – Updated: 2026-08-31 18:20
VLAI
EPSS
VEX
Title
Trilium: Note Import to RCE via Mind Elixir dangerouslySetInnerHtml
Summary
Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the mindMap note type, whose JSON content is stored without sanitization, allowing an attacker-supplied import archive to embed a payload that renders as arbitrary HTML. A mind map node can carry a dangerouslySetInnerHTML property that the Mind Elixir library assigns directly to a node's innerHTML, so a malicious note survives Safe import and executes script as soon as the victim opens the imported mind map. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim's machine. This issue is fixed in version 0.104.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:19 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/TriliumNext/Trilium/security/a… | x_refsource_CONFIRM |
| https://github.com/TriliumNext/Trilium/commit/15d… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TriliumNext | Trilium |
Affected:
< 0.104.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53578",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-31T18:19:37.124788Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T18:20:06.064Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/TriliumNext/Trilium/security/advisories/GHSA-rj57-j38v-3577"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Trilium",
"vendor": "TriliumNext",
"versions": [
{
"status": "affected",
"version": "\u003c 0.104.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on \"Safe import\" filter sanitizes HTML only for text notes and excludes the mindMap note type, whose JSON content is stored without sanitization, allowing an attacker-supplied import archive to embed a payload that renders as arbitrary HTML. A mind map node can carry a dangerouslySetInnerHTML property that the Mind Elixir library assigns directly to a node\u0027s innerHTML, so a malicious note survives Safe import and executes script as soon as the victim opens the imported mind map. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim\u0027s machine. This issue is fixed in version 0.104.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "ACTIVE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T19:21:21.331Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/TriliumNext/Trilium/security/advisories/GHSA-rj57-j38v-3577",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/TriliumNext/Trilium/security/advisories/GHSA-rj57-j38v-3577"
},
{
"name": "https://github.com/TriliumNext/Trilium/commit/15da3ff626c21fbadbc980ebb39e2f97085503a4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/TriliumNext/Trilium/commit/15da3ff626c21fbadbc980ebb39e2f97085503a4"
}
],
"source": {
"advisory": "GHSA-rj57-j38v-3577",
"discovery": "UNKNOWN"
},
"title": "Trilium: Note Import to RCE via Mind Elixir dangerouslySetInnerHtml"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53578",
"datePublished": "2026-08-27T19:21:21.331Z",
"dateReserved": "2026-06-09T19:11:53.484Z",
"dateUpdated": "2026-08-31T18:20:06.064Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53568 (GCVE-0-2026-53568)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:45 – Updated: 2026-06-12 16:08
VLAI
EPSS
VEX
Title
Frappe: Stored XSS in Frappe Report/List View via 'set_link_title_field_value'
Summary
Frappe is a full-stack web application framework. Prior to versions 15.107.2 and 16.17.4, there is a stored XSS vulnerablity in Frappe Report/List View. This issue has been patched in versions 15.107.2 and 16.17.4.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-12 16:08 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/frappe/frappe/security/advisor… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53568",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-12T16:08:16.906442Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-12T16:08:22.842Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "frappe",
"vendor": "frappe",
"versions": [
{
"status": "affected",
"version": "\u003c 15.107.2"
},
{
"status": "affected",
"version": "\u003c 16.17.4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Frappe is a full-stack web application framework. Prior to versions 15.107.2 and 16.17.4, there is a stored XSS vulnerablity in Frappe Report/List View. This issue has been patched in versions 15.107.2 and 16.17.4."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-12T14:45:11.531Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/frappe/frappe/security/advisories/GHSA-rx63-c3fh-8926",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/frappe/frappe/security/advisories/GHSA-rx63-c3fh-8926"
}
],
"source": {
"advisory": "GHSA-rx63-c3fh-8926",
"discovery": "UNKNOWN"
},
"title": "Frappe: Stored XSS in Frappe Report/List View via \u0027set_link_title_field_value\u0027"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53568",
"datePublished": "2026-06-12T14:45:11.531Z",
"dateReserved": "2026-06-09T19:11:53.483Z",
"dateUpdated": "2026-06-12T16:08:22.842Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53555 (GCVE-0-2026-53555)
Vulnerability from cvelistv5 – Published: 2026-09-17 21:40 – Updated: 2026-09-18 13:14
VLAI
EPSS
VEX
Title
Stored XSS via SVG Upload
Summary
SQLBot is an intelligent Text-to-SQL system based on large language models and RAG. Prior to 1.9.0, an authenticated uploader can submit an image/svg+xml assistant UI logo through PATCH /api/v1/system/assistant/ui, and SQLBot stores the SVG without sanitizing or validating embedded active content. SQLBot later serves the file inline from the same application origin through GET /api/v1/system/assistant/picture/{filename}. When another user loads that generated resource, JavaScript embedded in the SVG executes in the SQLBot web application context, resulting in stored cross-site scripting with access to data and actions available to the victim's session. This issue is fixed in version 1.9.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 13:14 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/dataease/SQLBot/security/advis… | x_refsource_CONFIRM |
| https://github.com/dataease/SQLBot/pull/1160 | x_refsource_MISC |
| https://github.com/dataease/SQLBot/commit/835eefc… | x_refsource_MISC |
| https://github.com/dataease/SQLBot/releases/tag/v1.9.0 | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53555",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-18T13:14:34.338598Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-18T13:14:53.154Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/dataease/SQLBot/security/advisories/GHSA-v23m-5pvq-xcgx"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "SQLBot",
"vendor": "dataease",
"versions": [
{
"status": "affected",
"version": "\u003c 1.9.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "SQLBot is an intelligent Text-to-SQL system based on large language models and RAG. Prior to 1.9.0, an authenticated uploader can submit an image/svg+xml assistant UI logo through PATCH /api/v1/system/assistant/ui, and SQLBot stores the SVG without sanitizing or validating embedded active content. SQLBot later serves the file inline from the same application origin through GET /api/v1/system/assistant/picture/{filename}. When another user loads that generated resource, JavaScript embedded in the SVG executes in the SQLBot web application context, resulting in stored cross-site scripting with access to data and actions available to the victim\u0027s session. This issue is fixed in version 1.9.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T21:40:48.271Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/dataease/SQLBot/security/advisories/GHSA-v23m-5pvq-xcgx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/dataease/SQLBot/security/advisories/GHSA-v23m-5pvq-xcgx"
},
{
"name": "https://github.com/dataease/SQLBot/pull/1160",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dataease/SQLBot/pull/1160"
},
{
"name": "https://github.com/dataease/SQLBot/commit/835eefcb39b595248ea006f3cfce445d2f49167e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dataease/SQLBot/commit/835eefcb39b595248ea006f3cfce445d2f49167e"
},
{
"name": "https://github.com/dataease/SQLBot/releases/tag/v1.9.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dataease/SQLBot/releases/tag/v1.9.0"
}
],
"source": {
"advisory": "GHSA-v23m-5pvq-xcgx",
"discovery": "UNKNOWN"
},
"title": "Stored XSS via SVG Upload"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53555",
"datePublished": "2026-09-17T21:40:48.271Z",
"dateReserved": "2026-06-09T18:13:07.263Z",
"dateUpdated": "2026-09-18T13:14:53.154Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53529 (GCVE-0-2026-53529)
Vulnerability from cvelistv5 – Published: 2026-08-21 21:29 – Updated: 2026-08-21 21:42
VLAI
EPSS
VEX
Title
LeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title into dangerouslySetInnerHTML)
Summary
LeafWiki is a self-hosted wiki. Prior to version 0.10.2, page titles returned by the search API could be rendered as raw HTML in the frontend. A user with editor or administrator permissions could create or modify a page title containing an HTML/JavaScript payload. When another user searched for a matching term, the payload could execute in the victim’s browser. The impact depends on deployment configuration. With `--public-access` enabled, unauthenticated visitors could be affected. In authenticated-only deployments, the issue could be used for cross-user XSS against logged-in users who can access search results. The issue has been fixed in version 0.10.2 by ensuring that author-controlled page titles in search results are not interpreted as raw HTML by the browser while preserving search result highlighting.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 21:41 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/perber/leafwiki/security/advis… | x_refsource_CONFIRM |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53529",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-21T21:41:16.312734Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T21:42:08.184Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "leafwiki",
"vendor": "perber",
"versions": [
{
"status": "affected",
"version": "\u003c 0.10.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LeafWiki is a self-hosted wiki. Prior to version 0.10.2, page titles returned by the search API could be rendered as raw HTML in the frontend. A user with editor or administrator permissions could create or modify a page title containing an HTML/JavaScript payload. When another user searched for a matching term, the payload could execute in the victim\u2019s browser. The impact depends on deployment configuration. With `--public-access` enabled, unauthenticated visitors could be affected. In authenticated-only deployments, the issue could be used for cross-user XSS against logged-in users who can access search results. The issue has been fixed in version 0.10.2 by ensuring that author-controlled page titles in search results are not interpreted as raw HTML by the browser while preserving search result highlighting."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "ACTIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T21:29:11.952Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/perber/leafwiki/security/advisories/GHSA-j344-qxqm-wg64",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/perber/leafwiki/security/advisories/GHSA-j344-qxqm-wg64"
}
],
"source": {
"advisory": "GHSA-j344-qxqm-wg64",
"discovery": "UNKNOWN"
},
"title": "LeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title into dangerouslySetInnerHTML)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53529",
"datePublished": "2026-08-21T21:29:11.952Z",
"dateReserved": "2026-06-09T17:30:33.457Z",
"dateUpdated": "2026-08-21T21:42:08.184Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53473 (GCVE-0-2026-53473)
Vulnerability from cvelistv5 – Published: 2026-06-10 13:55 – Updated: 2026-06-10 15:46
VLAI
EPSS
VEX
Title
Migration-planner-ui-app: stored xss via javascript: url in agent credential link
Summary
A flaw was found in migration-planner-ui-app. An attacker can register a malicious discovery agent with a specially crafted credentialUrl containing JavaScript code. When an organizational user clicks this link in the user interface, the embedded malicious code executes within the user's browser session. This cross-site scripting (XSS) vulnerability allows the attacker to compromise the victim's Red Hat Single Sign-On (SSO) session, potentially leading to unauthorized cross-tenant data access and API actions.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 15:46 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-53473 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487107 | issue-trackingx_refsource_REDHAT |
| https://github.com/kubev2v/migration-planner-ui-a… |
Date Public
2026-06-07 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53473",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-10T15:46:15.928213Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-10T15:46:25.699Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/kubev2v/migration-planner-ui-app",
"defaultStatus": "unaffected",
"packageName": "migration-planner-ui-app",
"versions": [
{
"lessThan": "0.13.5",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"datePublic": "2026-06-07T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in migration-planner-ui-app. An attacker can register a malicious discovery agent with a specially crafted credentialUrl containing JavaScript code. When an organizational user clicks this link in the user interface, the embedded malicious code executes within the user\u0027s browser session. This cross-site scripting (XSS) vulnerability allows the attacker to compromise the victim\u0027s Red Hat Single Sign-On (SSO) session, potentially leading to unauthorized cross-tenant data access and API actions."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-10T13:55:37.602Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-53473"
},
{
"name": "RHBZ#2487107",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487107"
},
{
"url": "https://github.com/kubev2v/migration-planner-ui-app/pull/750"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-09T18:00:35.756Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-06-07T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Migration-planner-ui-app: stored xss via javascript: url in agent credential link",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2026-53473",
"datePublished": "2026-06-10T13:55:37.602Z",
"dateReserved": "2026-06-09T17:03:29.627Z",
"dateUpdated": "2026-06-10T15:46:25.699Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53472 (GCVE-0-2026-53472)
Vulnerability from cvelistv5 – Published: 2026-08-14 14:00 – Updated: 2026-08-14 14:36
VLAI
EPSS
VEX
Title
Migration-planner: credentialurl validator accepts javascript: urls
Summary
A flaw was found in migration-planner. Insufficient validation of the `AgentStatusUpdate.CredentialUrl` field allows an authenticated attacker to store a malicious `javascript:` URL. When a victim views this URL in the Hybrid Cloud Console, it can lead to Cross-Site Scripting (XSS), enabling script execution in the victim's session and potentially disclosing sensitive information.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 14:35 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-53472 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487073 | issue-trackingx_refsource_REDHAT |
Date Public
2026-06-07 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53472",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-14T14:35:49.932760Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T14:36:00.938Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/kubev2v/migration-planner",
"defaultStatus": "unaffected",
"packageName": "migration-planner",
"versions": [
{
"lessThan": "0.13.6",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"datePublic": "2026-06-07T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in migration-planner. Insufficient validation of the `AgentStatusUpdate.CredentialUrl` field allows an authenticated attacker to store a malicious `javascript:` URL. When a victim views this URL in the Hybrid Cloud Console, it can lead to Cross-Site Scripting (XSS), enabling script execution in the victim\u0027s session and potentially disclosing sensitive information."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T14:00:33.383Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-53472"
},
{
"name": "RHBZ#2487073",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487073"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-09T17:50:51.690Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-06-07T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Migration-planner: credentialurl validator accepts javascript: urls",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2026-53472",
"datePublished": "2026-08-14T14:00:33.383Z",
"dateReserved": "2026-06-09T17:03:29.627Z",
"dateUpdated": "2026-08-14T14:36:00.938Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53468 (GCVE-0-2026-53468)
Vulnerability from cvelistv5 – Published: 2026-08-21 21:16 – Updated: 2026-08-24 19:38
VLAI
EPSS
VEX
Title
Typemill has Stored HTML Attribute Injection in Metadata Fields
Summary
Typemill is a flat-file, Markdown-based content management system designed for informational documentation websites. Versions prior to 2.23.0 are vulnerable to stored HTML attribute injection in the page metadata fields (`og:title` and `og:description`). An authenticated user with permission to modify page metadata can inject arbitrary HTML attributes into generated `<meta>` tags due to missing output encoding. Under certain browser or DOM interaction scenarios, this may lead to stored cross-site scripting (XSS). Version 2.23.0 fixes the issue.
Severity
4.6 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 19:38 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/typemill/typemill/security/adv… | x_refsource_CONFIRM |
| https://github.com/typemill/typemill/releases/tag… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53468",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-24T19:38:07.139955Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-24T19:38:32.055Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "typemill",
"vendor": "typemill",
"versions": [
{
"status": "affected",
"version": "\u003c 2.23.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Typemill is a flat-file, Markdown-based content management system designed for informational documentation websites. Versions prior to 2.23.0 are vulnerable to stored HTML attribute injection in the page metadata fields (`og:title` and `og:description`). An authenticated user with permission to modify page metadata can inject arbitrary HTML attributes into generated `\u003cmeta\u003e` tags due to missing output encoding. Under certain browser or DOM interaction scenarios, this may lead to stored cross-site scripting (XSS). Version 2.23.0 fixes the issue."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T21:16:07.987Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr"
},
{
"name": "https://github.com/typemill/typemill/releases/tag/v2.23.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/typemill/typemill/releases/tag/v2.23.0"
}
],
"source": {
"advisory": "GHSA-wg6r-jwmr-p7gr",
"discovery": "UNKNOWN"
},
"title": "Typemill has Stored HTML Attribute Injection in Metadata Fields"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-53468",
"datePublished": "2026-08-21T21:16:07.987Z",
"dateReserved": "2026-06-09T16:31:21.496Z",
"dateUpdated": "2026-08-24T19:38:32.055Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-53427 (GCVE-0-2026-53427)
Vulnerability from cvelistv5 – Published: 2026-06-29 18:50 – Updated: 2026-06-30 04:37
VLAI
EPSS
VEX
Title
Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute
Summary
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown.
When syntax highlighting and full info-string forwarding (render: [full_info_string: true]) are enabled, the Lumis adapter copies the value of a code fence's highlight_lines_class info-string attribute, unescaped, into the class attribute of every rendered line. comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes in native/comrak_nif/src/lumis_adapter.rs shlex-parses the info string and stores each key=value pair verbatim, highlight_lines_config pulls highlight_lines_class into the per-line class value, and write_highlighted interpolates that value directly into the class attribute of the per-line <div>. A single-quoted shell token preserves an inner double quote through shlex parsing, so a value such as '"><script>alert(1)</script>' terminates the class attribute early and the markup that follows is emitted as live HTML.
An attacker who can submit Markdown (through comments, posts, wiki pages, documentation, or any user-generated content) can inject arbitrary HTML and JavaScript that runs in the browser of every user who views the rendered output, enabling session theft, account takeover, and other client-side attacks. No authentication or special privileges are required.
The vulnerable native code originally shipped inside mdex (in native/comrak_nif/src/lumis_adapter.rs) and was later extracted into the separate mdex_native package (native/mdex_native_nif/src/lumis_adapter.rs), where it remains unpatched.
This issue affects mdex from 0.11.3 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 19:18 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/leandrocp/mdex_native/security… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-53427.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-53427 | related |
| https://github.com/leandrocp/mdex_native/commit/7… | patch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| leandrocp | mdex |
Affected:
0.11.3 , < 0.12.3
(semver)
cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:* |
|
| leandrocp | mdex |
Affected:
0d7ffc84ea742e1daf666426814e5bb6d0499433 , < 6ed94d905f97af188323f042698ae841c02293b4
(git)
cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:* |
|
| leandrocp | mdex_native |
Affected:
0.1.0 , < 0.2.3
(semver)
cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:* |
|
| leandrocp | mdex_native |
Affected:
956528c5e31746253347029e810a969ab916fd27 , < 798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3
(git)
cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53427",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-29T19:18:13.166991Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-29T19:19:28.028Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.MDEx\u0027",
"comrak_nif"
],
"packageName": "mdex",
"packageURL": "pkg:hex/mdex",
"product": "mdex",
"programFiles": [
"native/comrak_nif/src/lumis_adapter.rs"
],
"programRoutines": [
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"
},
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"
},
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"
},
{
"name": "\u0027Elixir.MDEx\u0027:to_html/2"
}
],
"repo": "https://github.com/leandrocp/mdex",
"vendor": "leandrocp",
"versions": [
{
"lessThan": "0.12.3",
"status": "affected",
"version": "0.11.3",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.MDEx\u0027",
"comrak_nif"
],
"packageName": "leandrocp/mdex",
"packageURL": "pkg:github/leandrocp/mdex",
"product": "mdex",
"programFiles": [
"native/comrak_nif/src/lumis_adapter.rs"
],
"programRoutines": [
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"
},
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"
},
{
"name": "comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"
},
{
"name": "\u0027Elixir.MDEx\u0027:to_html/2"
}
],
"repo": "https://github.com/leandrocp/mdex",
"vendor": "leandrocp",
"versions": [
{
"lessThan": "6ed94d905f97af188323f042698ae841c02293b4",
"status": "affected",
"version": "0d7ffc84ea742e1daf666426814e5bb6d0499433",
"versionType": "git"
}
]
},
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.MDExNative.Comrak\u0027",
"mdex_native_nif"
],
"packageName": "mdex_native",
"packageURL": "pkg:hex/mdex_native",
"product": "mdex_native",
"programFiles": [
"native/mdex_native_nif/src/lumis_adapter.rs"
],
"programRoutines": [
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"
},
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"
},
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::write_highlighted"
},
{
"name": "\u0027Elixir.MDExNative.Native\u0027:document_to_html_with_options/2"
},
{
"name": "\u0027Elixir.MDExNative.Comrak\u0027:document_to_html/2"
}
],
"repo": "https://github.com/leandrocp/mdex_native",
"vendor": "leandrocp",
"versions": [
{
"lessThan": "0.2.3",
"status": "affected",
"version": "0.1.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.MDExNative.Comrak\u0027",
"mdex_native_nif"
],
"packageName": "leandrocp/mdex_native",
"packageURL": "pkg:github/leandrocp/mdex_native",
"product": "mdex_native",
"programFiles": [
"native/mdex_native_nif/src/lumis_adapter.rs"
],
"programRoutines": [
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"
},
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"
},
{
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::write_highlighted"
},
{
"name": "\u0027Elixir.MDExNative.Native\u0027:document_to_html_with_options/2"
},
{
"name": "\u0027Elixir.MDExNative.Comrak\u0027:document_to_html/2"
}
],
"repo": "https://github.com/leandrocp/mdex_native",
"vendor": "leandrocp",
"versions": [
{
"lessThan": "798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3",
"status": "affected",
"version": "956528c5e31746253347029e810a969ab916fd27",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eThe vulnerable code path is only reachable when MDEx is configured with a syntax-highlighting formatter (for example \u003ctt\u003esyntax_highlight: [formatter: {:html_inline, ...}]\u003c/tt\u003e or \u003ctt\u003e{:html_linked, ...}\u003c/tt\u003e) and with full info-string forwarding enabled (\u003ctt\u003erender: [full_info_string: true]\u003c/tt\u003e). Full info-string forwarding is required for comrak to hand the \u003ctt\u003ehighlight_lines_class\u003c/tt\u003e attribute to the highlighter, so any application that uses the line-highlighting attributes already has it enabled.\u003c/p\u003e"
}
],
"value": "The vulnerable code path is only reachable when MDEx is configured with a syntax-highlighting formatter (for example syntax_highlight: [formatter: {:html_inline, ...}] or {:html_linked, ...}) and with full info-string forwarding enabled (render: [full_info_string: true]). Full info-string forwarding is required for comrak to hand the highlight_lines_class attribute to the highlighter, so any application that uses the line-highlighting attributes already has it enabled."
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*",
"versionEndExcluding": "0.12.3",
"versionStartIncluding": "0.11.3",
"vulnerable": true
}
],
"negate": false,
"operator": "AND"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*",
"versionEndExcluding": "0.2.3",
"versionStartIncluding": "0.1.0",
"vulnerable": true
}
],
"negate": false,
"operator": "AND"
}
],
"operator": "OR"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Leandro Pereira"
},
{
"lang": "en",
"type": "analyst",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eImproper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown.\u003c/p\u003e\u003cp\u003eWhen syntax highlighting and full info-string forwarding (\u003ctt\u003erender: [full_info_string: true]\u003c/tt\u003e) are enabled, the Lumis adapter copies the value of a code fence\u0027s \u003ctt\u003ehighlight_lines_class\u003c/tt\u003e info-string attribute, unescaped, into the \u003ctt\u003eclass\u003c/tt\u003e attribute of every rendered line. \u003ctt\u003ecomrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes\u003c/tt\u003e in \u003ctt\u003enative/comrak_nif/src/lumis_adapter.rs\u003c/tt\u003e shlex-parses the info string and stores each \u003ctt\u003ekey=value\u003c/tt\u003e pair verbatim, \u003ctt\u003ehighlight_lines_config\u003c/tt\u003e pulls \u003ctt\u003ehighlight_lines_class\u003c/tt\u003e into the per-line class value, and \u003ctt\u003ewrite_highlighted\u003c/tt\u003e interpolates that value directly into the \u003ctt\u003eclass\u003c/tt\u003e attribute of the per-line \u003ctt\u003e\u0026lt;div\u0026gt;\u003c/tt\u003e. A single-quoted shell token preserves an inner double quote through shlex parsing, so a value such as \u003ctt\u003e\u0027\u0026quot;\u0026gt;\u0026lt;script\u0026gt;alert(1)\u0026lt;/script\u0026gt;\u0027\u003c/tt\u003e terminates the \u003ctt\u003eclass\u003c/tt\u003e attribute early and the markup that follows is emitted as live HTML.\u003c/p\u003e\u003cp\u003eAn attacker who can submit Markdown (through comments, posts, wiki pages, documentation, or any user-generated content) can inject arbitrary HTML and JavaScript that runs in the browser of every user who views the rendered output, enabling session theft, account takeover, and other client-side attacks. No authentication or special privileges are required.\u003c/p\u003e\u003cp\u003eThe vulnerable native code originally shipped inside \u003ctt\u003emdex\u003c/tt\u003e (in \u003ctt\u003enative/comrak_nif/src/lumis_adapter.rs\u003c/tt\u003e) and was later extracted into the separate \u003ctt\u003emdex_native\u003c/tt\u003e package (\u003ctt\u003enative/mdex_native_nif/src/lumis_adapter.rs\u003c/tt\u003e), where it remains unpatched.\u003c/p\u003e\u003cp\u003eThis issue affects mdex from 0.11.3 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown.\n\nWhen syntax highlighting and full info-string forwarding (render: [full_info_string: true]) are enabled, the Lumis adapter copies the value of a code fence\u0027s highlight_lines_class info-string attribute, unescaped, into the class attribute of every rendered line. comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes in native/comrak_nif/src/lumis_adapter.rs shlex-parses the info string and stores each key=value pair verbatim, highlight_lines_config pulls highlight_lines_class into the per-line class value, and write_highlighted interpolates that value directly into the class attribute of the per-line \u003cdiv\u003e. A single-quoted shell token preserves an inner double quote through shlex parsing, so a value such as \u0027\"\u003e\u003cscript\u003ealert(1)\u003c/script\u003e\u0027 terminates the class attribute early and the markup that follows is emitted as live HTML.\n\nAn attacker who can submit Markdown (through comments, posts, wiki pages, documentation, or any user-generated content) can inject arbitrary HTML and JavaScript that runs in the browser of every user who views the rendered output, enabling session theft, account takeover, and other client-side attacks. No authentication or special privileges are required.\n\nThe vulnerable native code originally shipped inside mdex (in native/comrak_nif/src/lumis_adapter.rs) and was later extracted into the separate mdex_native package (native/mdex_native_nif/src/lumis_adapter.rs), where it remains unpatched.\n\nThis issue affects mdex from 0.11.3 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3."
}
],
"impacts": [
{
"capecId": "CAPEC-63",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-63 Cross-Site Scripting (XSS)"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-30T04:37:51.902Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/leandrocp/mdex_native/security/advisories/GHSA-v664-pmxr-mxxx"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-53427.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-53427"
},
{
"tags": [
"patch"
],
"url": "https://github.com/leandrocp/mdex_native/commit/798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eDo not enable full info-string forwarding (\u003ctt\u003erender: [full_info_string: true]\u003c/tt\u003e) when rendering untrusted Markdown, which prevents the \u003ctt\u003ehighlight_lines_class\u003c/tt\u003e attribute from reaching the highlighter. Alternatively, restrict \u003ctt\u003ehighlight_lines_class\u003c/tt\u003e values to a safe character set (for example \u003ctt\u003e[A-Za-z0-9_- ]\u003c/tt\u003e) before rendering.\u003c/p\u003e"
}
],
"value": "Do not enable full info-string forwarding (render: [full_info_string: true]) when rendering untrusted Markdown, which prevents the highlight_lines_class attribute from reaching the highlighter. Alternatively, restrict highlight_lines_class values to a safe character set (for example [A-Za-z0-9_- ]) before rendering."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-53427",
"datePublished": "2026-06-29T18:50:17.185Z",
"dateReserved": "2026-06-09T11:01:47.529Z",
"dateUpdated": "2026-06-30T04:37:51.902Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-52873 (GCVE-0-2026-52873)
Vulnerability from cvelistv5 – Published: 2026-08-18 21:28 – Updated: 2026-08-21 19:18
VLAI
EPSS
VEX
Title
Streambert: Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electron Renderer
Summary
Streambert is a cross-platform Electron Desktop App to stream and download video content. From version 2.5.0 until version 2.6.0, the wyzie-open-redeem IPC handler in index.js creates the partition:wyzie-redeem Electron session and registers an onHeadersReceived hook that removes the Content-Security-Policy header from every response in that session. The redeem window also lacks a setWindowOpenHandler restriction, so script injection in sub.wyzie.io, a loaded third-party resource, or a site reached through navigation executes without CSP constraints and can affect additional windows and persistent session storage. A user must open the Wyzie API key redemption window, and exploitation requires attacker-controlled script content in a loaded page. The resulting renderer script can invoke renderer-exposed application functionality and can be chained with other vulnerabilities to access internal services or sensitive data. This issue is fixed in version 2.6.0.
Severity
6.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:17 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/truelockmc/streambert/security… | x_refsource_CONFIRM |
| https://github.com/truelockmc/streambert/pull/126 | x_refsource_MISC |
| https://github.com/truelockmc/streambert/commit/0… | x_refsource_MISC |
| https://github.com/truelockmc/streambert/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| truelockmc | streambert |
Affected:
< 2.6.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-52873",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-21T19:17:53.917334Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T19:18:23.077Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/truelockmc/streambert/security/advisories/GHSA-2j2q-qvpf-wh43"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "streambert",
"vendor": "truelockmc",
"versions": [
{
"status": "affected",
"version": "\u003c 2.6.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Streambert is a cross-platform Electron Desktop App to stream and download video content. From version 2.5.0 until version 2.6.0, the wyzie-open-redeem IPC handler in index.js creates the partition:wyzie-redeem Electron session and registers an onHeadersReceived hook that removes the Content-Security-Policy header from every response in that session. The redeem window also lacks a setWindowOpenHandler restriction, so script injection in sub.wyzie.io, a loaded third-party resource, or a site reached through navigation executes without CSP constraints and can affect additional windows and persistent session storage. A user must open the Wyzie API key redemption window, and exploitation requires attacker-controlled script content in a loaded page. The resulting renderer script can invoke renderer-exposed application functionality and can be chained with other vulnerabilities to access internal services or sensitive data. This issue is fixed in version 2.6.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-693",
"description": "CWE-693: Protection Mechanism Failure",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T21:28:18.806Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/truelockmc/streambert/security/advisories/GHSA-2j2q-qvpf-wh43",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/truelockmc/streambert/security/advisories/GHSA-2j2q-qvpf-wh43"
},
{
"name": "https://github.com/truelockmc/streambert/pull/126",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/truelockmc/streambert/pull/126"
},
{
"name": "https://github.com/truelockmc/streambert/commit/0bd6b6ca8c830f22f75de1aa2e0d8b9bdf6d34c7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/truelockmc/streambert/commit/0bd6b6ca8c830f22f75de1aa2e0d8b9bdf6d34c7"
},
{
"name": "https://github.com/truelockmc/streambert/releases/tag/2.6.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/truelockmc/streambert/releases/tag/2.6.0"
}
],
"source": {
"advisory": "GHSA-2j2q-qvpf-wh43",
"discovery": "UNKNOWN"
},
"title": "Streambert: Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electron Renderer"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-52873",
"datePublished": "2026-08-18T21:28:18.806Z",
"dateReserved": "2026-06-08T21:44:27.364Z",
"dateUpdated": "2026-08-21T19:18:23.077Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation MIT-4
Architecture and Design
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
- Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
Mitigation
Implementation
Architecture and Design
- Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
- For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
- Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
- etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
- Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
- HTML body
- Element attributes (such as src="XYZ")
- URIs
- JavaScript sections
- Cascading Style Sheets and style property
Mitigation MIT-6
Architecture and Design
Implementation
Strategy: Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
Mitigation MIT-15
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation MIT-27
Architecture and Design
Strategy: Parameterization
If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
Mitigation MIT-30.1
Implementation
Strategy: Output Encoding
- Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
- The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
Mitigation MIT-31
Implementation
Strategy: Attack Surface Reduction
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
Mitigation MIT-5
Implementation
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- When dynamically constructing web pages, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. All input should be validated and cleansed, not just parameters that the user is supposed to specify, but all data in the request, including hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. It is common to see data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
- Note that proper output encoding, escaping, and quoting is the most effective solution for preventing XSS, although input validation may provide some defense-in-depth. This is because it effectively limits what will appear in output. Input validation will not always prevent XSS, especially if you are required to support free-form text fields that could contain arbitrary characters. For example, in a chat application, the heart emoticon ("<3") would likely pass the validation step, since it is commonly used. However, it cannot be directly inserted into the web page because it contains the "<" character, which would need to be escaped or otherwise handled. In this case, stripping the "<" might reduce the risk of XSS, but it would produce incorrect behavior because the emoticon would not be recorded. This might seem to be a minor inconvenience, but it would be more important in a mathematical forum that wants to represent inequalities.
- Even if you make a mistake in your validation (such as forgetting one out of 100 input fields), appropriate encoding is still likely to protect you from injection-based attacks. As long as it is not done in isolation, input validation is still a useful technique, since it may significantly reduce your attack surface, allow you to detect some attacks, and provide other security benefits that proper encoding does not address.
- Ensure that you perform input validation at well-defined interfaces within the application. This will help protect the application even if a component is reused or moved elsewhere.
Mitigation MIT-21
Architecture and Design
Strategy: Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation MIT-29
Operation
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
Mitigation MIT-16
Operation
Implementation
Strategy: Environment Hardening
When using PHP, configure the application so that it does not use register_globals. During implementation, develop the application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.
CAPEC-209: XSS Using MIME Type Mismatch
An adversary creates a file with scripting content but where the specified MIME type of the file is such that scripting is not expected. The adversary tricks the victim into accessing a URL that responds with the script file. Some browsers will detect that the specified MIME type of the file does not match the actual type of its content and will automatically switch to using an interpreter for the real content type. If the browser does not invoke script filters before doing this, the adversary's script may run on the target unsanitized, possibly revealing the victim's cookies or executing arbitrary script in their browser.
CAPEC-588: DOM-Based XSS
This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is inserted into the client-side HTML being parsed by a web browser. Content served by a vulnerable web application includes script code used to manipulate the Document Object Model (DOM). This script code either does not properly validate input, or does not perform proper output encoding, thus creating an opportunity for an adversary to inject a malicious script launch a XSS attack. A key distinction between other XSS attacks and DOM-based attacks is that in other XSS attacks, the malicious script runs when the vulnerable web page is initially loaded, while a DOM-based attack executes sometime after the page loads. Another distinction of DOM-based attacks is that in some cases, the malicious script is never sent to the vulnerable web server at all. An attack like this is guaranteed to bypass any server-side filtering attempts to protect users.
CAPEC-591: Reflected XSS
This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is "reflected" off a vulnerable web application and then executed by a victim's browser. The process starts with an adversary delivering a malicious script to a victim and convincing the victim to send the script to the vulnerable web application.
CAPEC-592: Stored XSS
An adversary utilizes a form of Cross-site Scripting (XSS) where a malicious script is persistently "stored" within the data storage of a vulnerable web application as valid input.
CAPEC-63: Cross-Site Scripting (XSS)
An adversary embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.
CAPEC-85: AJAX Footprinting
This attack utilizes the frequent client-server roundtrips in Ajax conversation to scan a system. While Ajax does not open up new vulnerabilities per se, it does optimize them from an attacker point of view. A common first step for an attacker is to footprint the target environment to understand what attacks will work. Since footprinting relies on enumeration, the conversational pattern of rapid, multiple requests and responses that are typical in Ajax applications enable an attacker to look for many vulnerabilities, well-known ports, network locations and so on. The knowledge gained through Ajax fingerprinting can be used to support other attacks, such as XSS.