CVE-2021-36125: Mediawiki

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in the CentralAuth extension in MediaWiki through 1.36. The Special:GlobalRenameRequest page is vulnerable to infinite loops and denial of service attacks when a user's current username is beyond an arbitrary maximum configuration value (MaxNameChars).

Affected products

• Mediawiki Mediawiki: up to and including 1.36

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