CVE-2025-67484: Mediawiki

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiFormatXml.Php. This issue affects MediaWiki: from * before 1.39.16, 1.43.6, 1.44.3, 1.45.1.

Affected products

• Mediawiki Mediawiki: from 1.39.0, before 1.39.16 (fixed in 1.39.16); from 1.43.0, before 1.43.6 (fixed in 1.43.6); from 1.44.0, before 1.44.3 (fixed in 1.44.3); version 1.45.0 only

Published 2026-02-03. Last modified 2026-06-17.