CVE-2023-36674: Mediawiki

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in MediaWiki before 1.35.11, 1.36.x through 1.38.x before 1.38.7, 1.39.x before 1.39.4, and 1.40.x before 1.40.1. It is possible to bypass the Bad image list (aka badFile) by using the thumb parameter (aka Manualthumb) of the File syntax.

Affected products

• Mediawiki Mediawiki: before 1.35.11 (fixed in 1.35.11); from 1.36.0, before 1.38.7 (fixed in 1.38.7); from 1.39.0, before 1.39.4 (fixed in 1.39.4); version 1.40.0 only

Published 2023-08-20. Last modified 2026-06-17.