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CVE-2025-59839— Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes

Quick assessment

Affected
StarCitizenWiki mediawiki-extensions-EmbedVideo
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Extension Embed Video是Star Citizen Wiki开源的一个嵌入式视频软件。 EmbedVideo Extension 4.0.0及之前版本存在安全漏洞，该漏洞源于允许向HTML元素添加任意属性，可能导致存储型跨站脚本。

CVSS 8.6 · High EPSS 0.30% · P22
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I. Basic Information for CVE-2025-59839

Vulnerability Information
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Vulnerability Title
Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes
Source: CVE Program / CVE List V5
Vulnerability 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. In versions 4.0.0 and prior, the EmbedVideo extension allows adding arbitrary attributes to an HTML element, allowing for stored XSS through wikitext. This issue has been patched via commit 4e075d3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Extension Embed Video 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Extension Embed Video是Star Citizen Wiki开源的一个嵌入式视频软件。 EmbedVideo Extension 4.0.0及之前版本存在安全漏洞，该漏洞源于允许向HTML元素添加任意属性，可能导致存储型跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
StarCitizenWiki mediawiki-extensions-EmbedVideo <= 4.0.0 -

II. Public POCs for CVE-2025-59839

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6472 chars
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III. Intelligence Information for CVE-2025-59839

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Vendor Advisories for CVE-2025-59839 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2025-59839

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