Common Weakness Enumeration

CWE-80

Allowed

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Abstraction: Variant · Status: Incomplete

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

1006 vulnerabilities reference this CWE, most recent first.

CVE-2026-54443 (GCVE-0-2026-54443)

Vulnerability from cvelistv5 – Published: 2026-07-15 18:19 – Updated: 2026-07-15 19:17

Title

Dashy: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Summary

Dashy is a self-hostable personal dashboard. From 1.9.4 until 3.2.0, the Dashy RSS Widget in src/components/Widgets/RssFeed.vue does not sanitize RSS item link values before rendering feed item titles and Read More links as anchor href attributes, allowing an attacker-controlled feed to provide a javascript: URI that executes when clicked in the Dashy origin. This issue is fixed in version 3.2.0.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 19:15 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-84 - Improper Neutralization of Encoded URI Schemes in a Web Page

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/lissy93/dashy/security/advisor…	x_refsource_CONFIRM
https://github.com/lissy93/dashy/releases/tag/3.2.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
lissy93	dashy	Affected: >= 1.9.4, < 3.2.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-52854 (GCVE-0-2026-52854)

Vulnerability from cvelistv5 – Published: 2026-08-18 21:32 – Updated: 2026-08-19 18:33

Title

mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function

Summary

Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user's browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 18:33 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

5 references

URL	Tags
https://github.com/ProfessionalWiki/Maps/security…	x_refsource_CONFIRM
https://github.com/ProfessionalWiki/Maps/pull/899	x_refsource_MISC
https://github.com/ProfessionalWiki/Maps/commit/7…	x_refsource_MISC
https://github.com/ProfessionalWiki/Maps/blob/12.…	x_refsource_MISC
https://github.com/ProfessionalWiki/Maps/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ProfessionalWiki	Maps	Affected: < 12.1.3

Show details on NVD website

JSON

To clipboard

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CVE-2026-52816 (GCVE-0-2026-52816)

Vulnerability from cvelistv5 – Published: 2026-06-24 20:26 – Updated: 2026-06-25 20:22

Title

Gogs: Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS

Summary

Gogs is an open source self-hosted Git service. Prior to 0.14.3, the Jupyter Notebook (ipynb) sanitizer endpoint at POST /-/api/sanitize_ipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting (XSS). The endpoint uses bluemonday.UGCPolicy() with p.AllowURLSchemes("data") which permits all data URI schemes including data:text/html, enabling attackers to inject malicious HTML/JavaScript. Additionally, the endpoint has no authentication middleware, allowing any registered user to exploit this vulnerability. This vulnerability is fixed in 0.14.3.

Severity

5.4 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:P

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-25 20:19 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/gogs/gogs/security/advisories/…	x_refsource_CONFIRM
https://github.com/gogs/gogs/pull/8326	x_refsource_MISC
https://github.com/gogs/gogs/commit/dd1bd9837aa19…	x_refsource_MISC
https://github.com/gogs/gogs/releases/tag/v0.14.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gogs	gogs	Affected: < 0.14.3

Show details on NVD website

JSON

To clipboard

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CVE-2026-52774 (GCVE-0-2026-52774)

Vulnerability from cvelistv5 – Published: 2026-09-04 23:51 – Updated: 2026-09-08 13:05

Title

Reflected XSS via Unescaped `id` Parameter in Bazar Widget HTML Attributes in YesWiki

Summary

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki's Bazar widget handler reflects the id GET parameter into HTML attributes using strip_tags() only. Because strip_tags() does not escape double quotes, an attacker can break out of the attribute value, inject an event handler such as onmouseover, and execute arbitrary JavaScript in the victim's browser. This issue is reachable without authentication. During validation, the vulnerable widget route returned the injected HTML for both /HomePage/widget?id=... and /NoSuchPage/widget?id=..., which shows that no login, no page ownership, no edit rights, and not even a valid page tag were required. The only routing prerequisite observed was that the Bazar extension is enabled and the request includes an id parameter. This issue has been patched in version 4.6.6.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 13:05 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/YesWiki/yeswiki/security/advis…	x_refsource_CONFIRM
https://github.com/YesWiki/yeswiki/commit/1aa2710…	x_refsource_MISC
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
YesWiki	yeswiki	Affected: < 4.6.6

Show details on NVD website

JSON

To clipboard

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          "name": "https://github.com/YesWiki/yeswiki/commit/1aa2710c7505630b858f2142a65f9441bfaba2b2",
          "tags": [
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          "name": "https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6",
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        "advisory": "GHSA-r5xw-gcgw-hwp5",
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      },
      "title": "Reflected XSS via Unescaped `id` Parameter in Bazar Widget HTML Attributes in YesWiki"
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  },
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}

CVE-2026-52773 (GCVE-0-2026-52773)

Vulnerability from cvelistv5 – Published: 2026-09-04 23:44 – Updated: 2026-09-08 18:03

Title

Reflected XSS via Unescaped Archived-Revision `time` Parameter in `handlers/page/show.php` in YesWiki

Summary

YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML or JavaScript to a valid archived revision timestamp, still load that archived revision, and execute arbitrary JavaScript in the victim's browser. The vulnerable form is only rendered when the victim can both read and edit the target page. In restricted deployments this requires a victim with read and write access to that page. On a default doryphore 4.6.5 install, public pages such as PagePrincipale were editable anonymously during validation, so the issue can also affect unauthenticated visitors in that configuration. This issue has been patched in version 4.6.6.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:02 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/YesWiki/yeswiki/security/advis…	x_refsource_CONFIRM
https://github.com/YesWiki/yeswiki/commit/35ad9c2…	x_refsource_MISC
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
YesWiki	yeswiki	Affected: >= 4.1.0, < 4.6.6

Show details on NVD website

JSON

To clipboard

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CVE-2026-52741 (GCVE-0-2026-52741)

Vulnerability from cvelistv5 – Published: 2026-09-21 14:57 – Updated: 2026-09-24 22:13

Title

GoCD has stored XSS possible via tracking tool link highlighting on Compare Pipeline pages

Summary

GoCD is a continuous deliver server. From 18.3.0 until 26.1.0, GoCD can generate unescaped tracking-tool links from commit comments when a project uses a lenient Tracking Tool regular expression with an ID capturing group, such as JIRA-(.+). An attacker with commit access to a tracked material can place URI or HTML special characters in a matching commit comment, causing stored cross-site scripting when a victim views an affected Compare Pipeline page. Deployments without Tracking Tool integration, without an ID capturing group, or with conservative matchers that cannot match special characters are not affected. Successful exploitation can expose a privileged user session or allow changes using the victim's credentials and privileges. This issue is fixed in version 26.1.0.

Severity

7.5 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-24 22:13 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

5 references

URL	Tags
https://github.com/gocd/gocd/security/advisories/…	x_refsource_CONFIRM
https://github.com/gocd/gocd/pull/14356	x_refsource_MISC
https://github.com/gocd/gocd/commit/1adba7ded0b9e…	x_refsource_MISC
https://github.com/gocd/gocd/releases/tag/26.1.0	x_refsource_MISC
https://www.gocd.org/releases/#26-1-0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gocd	gocd	Affected: >= 18.3.0, < 26.1.0

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-52741",
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CVE-2026-50229 (GCVE-0-2026-50229)

Vulnerability from cvelistv5 – Published: 2026-06-29 20:36 – Updated: 2026-06-30 12:50

Title

Apache Tomcat: XSS in number guess example

Summary

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-30 12:49 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/wlt2no8bw45zl1w8b…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.22 (semver) Affected: 10.1.0-M1 , ≤ 10.1.55 (semver) Affected: 9.0.0.M1 , ≤ 9.0.118 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.0 , ≤ 7.0.109 (semver) Unknown: 0 , < 7.0.0 (semver)

Credits

Erichen, Institute of Computing Technology, Chinese Academy of Sciences Yashar Shahinzadeh Amirmohammad Safari

Show details on NVD website

JSON

To clipboard

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CVE-2026-50146 (GCVE-0-2026-50146)

Vulnerability from cvelistv5 – Published: 2026-06-22 17:31 – Updated: 2026-06-23 14:11

Title

Astro: Reflected XSS via unescaped slot name

Summary

Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflected XSS during SSR. This vulnerability is fixed in 6.3.3.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-23 14:10 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/withastro/astro/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
withastro	astro	Affected: < 6.3.3

Show details on NVD website

JSON

To clipboard

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CVE-2026-48910 (GCVE-0-2026-48910)

Vulnerability from cvelistv5 – Published: 2026-07-30 15:56 – Updated: 2026-07-30 16:37

Title

Apache JSPWiki: Markdown parser allows XSS injection in Markdown error processing

Summary

A carefully crafted editing request could trigger an XSS vulnerability on Apache JSPWiki when parsing errors on the markdown renderer, which could allow the attacker to execute javascript in the victim's browser and get some sensitive information about the victim. This issue affects Apache JSPWiki: through 2.12.3. Users are recommended to upgrade to version 2.12.4, which fixes the issue.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 16:36 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/yvbdjnocw5qq3xkbj…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache JSPWiki	Affected: 0 , ≤ 2.12.3 (semver)

Credits

Justin Ng from Cyver Security Agency of Singapore / Inland Reveue Authority of Singapore

Show details on NVD website

JSON

To clipboard

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CVE-2026-46492 (GCVE-0-2026-46492)

Vulnerability from cvelistv5 – Published: 2026-06-09 16:09 – Updated: 2026-06-09 18:39

Title

md-fileserver: Stored/Reflected XSS when viewing Markdown (raw HTML allowed)

Summary

md-fileserver allows for local viewing of markdown files in a browser. Prior to version 1.10.3, a cross-site scripting (XSS) vulnerability exists in the application’s Markdown rendering logic. When user-supplied Markdown content is rendered, embedded raw HTML—including <script> tags—is processed and injected into the resulting page without sanitization, allowing arbitrary JavaScript execution in the context of the affected domain. This issue has been patched in version 1.10.3.

Severity

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-09 18:25 UTC

CWE

CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-87 - Improper Neutralization of Alternate XSS Syntax

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/commenthol/md-fileserver/secur…	x_refsource_CONFIRM
https://github.com/commenthol/md-fileserver/relea…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
commenthol	md-fileserver	Affected: < 1.10.3

Show details on NVD website

JSON

To clipboard

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Mitigation

Implementation

Carefully check each input parameter against a rigorous positive specification (allowlist) defining the specific characters and format allowed. All input should be neutralized, 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. We often encounter 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.

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.

CAPEC-18: XSS Targeting Non-Script Elements

This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an adversary to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote adversary to collect and interpret the output of said attack.

CAPEC-193: PHP Remote File Inclusion

In this pattern the adversary is able to load and execute arbitrary code remotely available from the application. This is usually accomplished through an insecurely configured PHP runtime environment and an improperly sanitized "include" or "require" call, which the user can then control to point to any web-accessible file. This allows adversaries to hijack the targeted application and force it to execute their own instructions.

CAPEC-32: XSS Through HTTP Query Strings

An adversary embeds malicious script code in the parameters of an HTTP query string and convinces a victim to submit the HTTP request that contains the query string to a vulnerable web application. The web application then procedes to use the values parameters without properly validation them first and generates the HTML code that will be executed by the victim's browser.

CAPEC-86: XSS Through HTTP Headers

An adversary exploits web applications that generate web content, such as links in a HTML page, based on unvalidated or improperly validated data submitted by other actors. XSS in HTTP Headers attacks target the HTTP headers which are hidden from most users and may not be validated by web applications.

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