CVE-2025-59839

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

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.

Affected

StarCitizenWiki · mediawiki-extensions-EmbedVideo

CVSS v3.1 NVD

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 GITHUB

8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

EPSS

0.31% chance of exploitation in the next 30 days, 22nd percentile

Published

2025-09-25

Proof-of-concept exploits (1)

• advisories/GHSA-4j5h-mvj3-m48v

Security advisories

• StarCitizenWiki/mediawiki-extensions-EmbedVideo/security/advisories/GHSA-4j5h-mvj3-m48v
• StarCitizenWiki/mediawiki-extensions-EmbedVideo/commit/4e075d3dc9a15a3ee53f449a684d5ab847…

References

• CVE Record
• NVD entry