CVE-2023-29139: Mediawiki

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. When a user with checkuserlog permissions makes many CheckUserLog API requests in some configurations, denial of service can occur (RequestTimeoutException or upstream request timeout).

Affected products

• Mediawiki Mediawiki: up to and including 1.39.3

Published 2023-03-31. Last modified 2026-06-17.