CVE-2021-31548: Mediawiki

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.

Affected products

• Mediawiki Mediawiki: up to and including 1.35.2

Published 2021-04-22. Last modified 2026-06-17.