CVE-2025-53369: Starcitizentools Mediawiki-Extensions-Shortdescription

High severity, CVSS 8.6. EPSS: 0.3% chance of exploitation in the next 30 days.

Short Description is a MediaWiki extension that provides local short description support. In version 4.0.0, short descriptions are not properly sanitized before being inserted as HTML using mw.util.addSubtitle, allowing any user to insert arbitrary HTML into the DOM by editing a page. This issue has been patched in version 4.0.1.

Affected products

• Starcitizentools Mediawiki-Extensions-Shortdescription: from 05f6c6824f8f37dcc2d51cf6df4e7a09bea2196c, before 2c18bd21c5de53c336f55b6ff42f2983ea5796b4 (fixed in 2c18bd21c5de53c336f55b6ff42f2983ea5796b4); from 4.0.0, before 4.0.1 (fixed in 4.0.1)

Published 2025-07-03. Last modified 2026-06-17.