CVE-2013-4306: Mediawiki

Medium severity, CVSS 6.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Cross-site request forgery (CSRF) vulnerability in api/ApiQueryCheckUser.php in the CheckUser extension for MediaWiki, possibly Checkuser before 2.3, allows remote attackers to hijack the authentication of arbitrary users for requests that "perform sensitive write actions" via unspecified vectors.

Affected products

• Mediawiki Mediawiki: from 1.19.0, before 1.19.8 (fixed in 1.19.8); from 1.20.0, before 1.20.7 (fixed in 1.20.7); from 1.21.0, before 1.21.2 (fixed in 1.21.2)

Published 2013-10-11. Last modified 2026-06-16.