CVE-2026-55691: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in StarCitizenWiki mediawiki-extensions-EmbedVideo
The EmbedVideo Extension is a MediaWiki extension which adds a parser function called #ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, EmbedHtmlFormatter::toHtml in includes/EmbedService/EmbedHtmlFormatter.php passes the user-supplied class value directly to sprintf while constructing a figure element. A quote in the class value can terminate the class attribute and inject arbitrary HTML attributes or markup into the rendered page. A user able to edit a wiki page can store JavaScript that executes for visitors who render the affected content. This issue is fixed in version 4.1.0.
CVE-2026-55691: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in StarCitizenWiki mediawiki-extensions-EmbedVideo
Description
The EmbedVideo Extension is a MediaWiki extension which adds a parser function called #ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, EmbedHtmlFormatter::toHtml in includes/EmbedService/EmbedHtmlFormatter.php passes the user-supplied class value directly to sprintf while constructing a figure element. A quote in the class value can terminate the class attribute and inject arbitrary HTML attributes or markup into the rendered page. A user able to edit a wiki page can store JavaScript that executes for visitors who render the affected content. This issue is fixed in version 4.1.0.
CVSS v3.1
Score 8.6high
Affected software
StarCitizenWiki
mediawiki-extensions-EmbedVideo
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-17T00:13:10.650Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa9769455bf5e2cf5196306
Added to database: 09/15/2026, 16:47:16 UTC
Last updated: 09/15/2026, 16:47:16 UTC
Views: 1
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