CVE-2021-36128: Mediawiki

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue was discovered in the CentralAuth extension in MediaWiki through 1.36. Autoblocks for CentralAuth-issued suppression blocks are not properly implemented.

Affected products

• Mediawiki Mediawiki: up to and including 1.36

Published 2021-07-02. Last modified 2026-06-17.