CVE-2015-6729: Mediawiki

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in thumb.php in MediaWiki before 1.23.10, 1.24.x before 1.24.3, and 1.25.x before 1.25.2 allows remote attackers to inject arbitrary web script or HTML via the rel404 parameter, which is not properly handled in an error page.

Affected products

• Mediawiki Mediawiki: up to and including 1.23.9; version 1.24.0 only; version 1.24.1 only; version 1.24.2 only; version 1.25.0 only; version 1.25.1 only

Published 2015-09-01. Last modified 2026-06-17.