PT-2025-39387 · Mediawiki · Embedvideo Extension

Published 2025-09-24 · Updated 2025-09-25 · CVE-2025-59839

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions EmbedVideo Extension versions prior to 4.0.0

Description The EmbedVideo Extension for MediaWiki, which includes a parser function called #ev and parser tags for embedding video clips, contains a flaw. Versions 4.0.0 and earlier permit the addition of arbitrary attributes to an HTML element, potentially leading to stored cross-site scripting (XSS) through wikitext. The issue was addressed with commit 4e075d3.

Recommendations Update to EmbedVideo Extension version 4.0.0 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-59839

GHSA-4J5H-MVJ3-M48V

Affected Products

Embedvideo Extension

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59839.json · Exploit
• 🔥 https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/security/advisories/GHSA-4j5h-mvj3-m48v · Exploit
• https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/commit/4e075d3dc9a15a3ee53f449a684d5ab847e52f01 · Patch
• https://osv.dev/vulnerability/GHSA-4j5h-mvj3-m48v · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-59839 · Security Note
• https://osv.dev/vulnerability/CVE-2025-59839 · Vendor Advisory
• https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo · Note
• https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/modules/iframe.js#L139-L155 · Note
• https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/ext.embedVideo.videolink.js#L5-L20 · Note
• https://twitter.com/CveFindCom/status/1971215475007709644 · Twitter Post
• https://t.me/cveNotify/136403 · Telegram Post
• https://t.me/CVEtracker/33319 · Telegram Post
• https://twitter.com/CVEnew/status/1971217155459830109 · Twitter Post