CVE-2024-34507: Fedoraproject Fedora

High severity, CVSS 7.4. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in includes/CommentFormatter/CommentParser.php in MediaWiki before 1.39.7, 1.40.x before 1.40.3, and 1.41.x before 1.41.1. XSS can occur because of mishandling of the 0x1b character, as demonstrated by Special:RecentChanges#%1b0000000.

Affected products

• Fedoraproject Fedora: version 40 only
• Mediawiki Mediawiki: before 1.39.7 (fixed in 1.39.7); from 1.40.0, before 1.40.3 (fixed in 1.40.3); from 1.41.0, before 1.41.1 (fixed in 1.41.1)

Published 2024-05-05. Last modified 2026-06-17.