Common Weakness Enumeration

CWE-80

Allowed

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

Abstraction: Variant · Status: Incomplete

API response cwe.mitre.org

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-2026-103585 (GCVE-0-2026-103585)

Vulnerability from cvelistv5 – Published: 2026-09-30 22:17 – Updated: 2026-10-01 15:54
VLAI
Title
attacker-controlled javascript license URL via XSS
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki MediaSearch extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki MediaSearch extension: 1.46, 1.45, and 1.43.
Severity
1.2 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:54 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki MediaSearch extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Credits
Marco Paciaroni (BomboBombone)
Show details on NVD website
To clipboard 

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CVE-2026-103584 (GCVE-0-2026-103584)

Vulnerability from cvelistv5 – Published: 2026-09-30 22:14 – Updated: 2026-10-01 15:53
VLAI
Title
attacker-controlled javascript license URL via XSS
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.
Severity
1.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:52 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki CommonsMetadata extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Credits
Marco Paciaroni (BomboBombone)
Show details on NVD website
To clipboard 

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CVE-2026-103445 (GCVE-0-2026-103445)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:04 – Updated: 2026-09-30 20:01
VLAI
Title
Stored XSS through PageForms #autoedit redirect links
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Page_Forms extension allows Stored XSS. This issue affects MediaWiki Page_Forms extension: 1.46, 1.45, and 1.43.
Severity
1.2 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:12 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki Page_Forms extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Credits
Marco Paciaroni (BomboBombone)
Show details on NVD website
To clipboard 

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CVE-2026-103444 (GCVE-0-2026-103444)

Vulnerability from cvelistv5 – Published: 2026-09-30 16:23 – Updated: 2026-09-30 20:01
VLAI
Title
Stored XSS through system messages in WikiForum
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows Stored XSS. This issue affects MediaWiki WikiForum extension: master.
Severity
1.1 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:12 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Credits
SomeRandomDeveloper
Show details on NVD website
To clipboard 

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CVE-2026-103443 (GCVE-0-2026-103443)

Vulnerability from cvelistv5 – Published: 2026-09-30 16:19 – Updated: 2026-09-30 20:01
VLAI
Title
API permits session-seeded javascript URL XSS
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Collection (Book) extension allows XSS Targeting Non-Script Elements. This issue affects MediaWiki Collection (Book) extension: 1.46, 1.45, and 1.43.
Severity
1.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:13 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki Collection (Book) extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Credits
Marco Paciaroni (BomboBombone)
Show details on NVD website
To clipboard 

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CVE-2026-103439 (GCVE-0-2026-103439)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:34 – Updated: 2026-09-30 20:01
VLAI
Title
Various rawParams() and escaped() updates to prevent XSS in Wikibase extension
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.
Severity
0.3 (Low)
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:12 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki Wikbase extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-103438 (GCVE-0-2026-103438)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:32 – Updated: 2026-09-30 20:01
VLAI
Title
Various rawParams() and escaped() updates to prevent XSS in Wikistories extension
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikistories extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikistories extension: 1.46, 1.45, and 1.43.
Severity
0.3 (Low)
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:11 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki Wikistories extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-103437 (GCVE-0-2026-103437)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:17 – Updated: 2026-09-30 20:01
VLAI
Title
ReadingLists imported metadata permits JavaScript URL XSS
Summary
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki ReadingLists extension allows Reflected XSS. This issue affects MediaWiki ReadingLists extension: 1.46 and 1.45.
Severity
1.1 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 18:12 UTC
CWE
  • CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
Impacted products
Credits
Marco Paciaroni (BomboBombone)
Show details on NVD website
To clipboard 

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CVE-2026-102279 (GCVE-0-2026-102279)

Vulnerability from cvelistv5 – Published: 2026-09-28 20:59 – Updated: 2026-09-29 14:44
VLAI
Title
Laravel: XSS in Debug Page Information
Summary
Laravel is a web application framework. Prior to 12.69.0 and 13.30.0, Laravel exception debug pages with APP_DEBUG=true pass attacker-controlled input to a Tippy.js tooltip configured with allowHTML true, enabling DOM-based cross-site scripting when a user hovers over the tooltip. This issue is fixed in versions 12.69.0 and 13.30.0.
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 14:43 UTC
CWE
  • CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
Impacted products
Vendor Product Version
laravel framework Affected: < 12.69.0
Affected: >= 13.0.0, < 13.30.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-91130 (GCVE-0-2026-91130)

Vulnerability from cvelistv5 – Published: 2026-09-22 19:02 – Updated: 2026-09-22 19:41
VLAI
Title
Home Assistant: XSS in Statistics Graph Card
Summary
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.7.0, the Statistics Graph card in src/components/chart/statistics-chart.ts passed entity names through getStatisticLabel and computeStateName and interpolated param.seriesName into ECharts tooltip HTML without escaping. An authenticated user or an integration that supplies a malicious default entity name could cause script-related HTML to execute when a viewer hovered over a data point. Mean, State, Sum, and Change fields in the default Line chart configuration were affected, while Bar charts were not. This issue is fixed in version 2026.7.0.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 19:39 UTC
CWE
  • CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
Impacted products
Vendor Product Version
home-assistant core Affected: < 2026.7.0
Create a notification for this product.
Show details on NVD website
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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