CVE-2026-103438: CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS) in The Wikimedia Foundation MediaWiki Wikistories extension
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.
AI Analysis
Technical Summary
CVE-2026-103438 is a basic Cross-Site Scripting (XSS) vulnerability in the MediaWiki Wikistories extension caused by improper neutralization of script-related HTML tags. This flaw affects versions 1.43, 1.45, and 1.46 of the extension. The vulnerability allows injection of script content in web pages, potentially enabling script execution in the context of the affected site. The CVSS 4.0 vector indicates local attack vector, high complexity, and privileges required, with partial impact on confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows an attacker with high privileges and local access to inject script-related HTML tags, leading to Cross-Site Scripting. The impact is limited due to the high attack complexity and required privileges, resulting in a low overall severity. There are no reports of exploitation in the wild.
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to trusted users with high privileges and monitor for suspicious activity related to script injection.
CVE-2026-103438: CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS) in The Wikimedia Foundation MediaWiki Wikistories extension
Description
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.
CVSS v4.0
Score 0.3low
Affected software
The Wikimedia Foundation
MediaWiki Wikistories extension
pkg:github/wikimedia/mediawiki-wikistories-extensionRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103438 is a basic Cross-Site Scripting (XSS) vulnerability in the MediaWiki Wikistories extension caused by improper neutralization of script-related HTML tags. This flaw affects versions 1.43, 1.45, and 1.46 of the extension. The vulnerability allows injection of script content in web pages, potentially enabling script execution in the context of the affected site. The CVSS 4.0 vector indicates local attack vector, high complexity, and privileges required, with partial impact on confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows an attacker with high privileges and local access to inject script-related HTML tags, leading to Cross-Site Scripting. The impact is limited due to the high attack complexity and required privileges, resulting in a low overall severity. There are no reports of exploitation in the wild.
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to trusted users with high privileges and monitor for suspicious activity related to script injection.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-09-30T15:41:01.269Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abd4b862a4e24523d52ada3
Added to database: 09/30/2026, 17:48:54 UTC
Last enriched: 09/30/2026, 18:03:42 UTC
Last updated: 10/01/2026, 05:04:46 UTC
Views: 15
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