CVE-2024-34500: Fedoraproject Fedora

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in the UnlinkedWikibase extension in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. XSS can occur through an interface message. Error messages (in the $err var) are not escaped before being passed to Html::rawElement() in the getError() function in the Hooks class.

Affected products

• Fedoraproject Fedora: version 40 only
• Mediawiki Mediawiki: before 1.39.6 (fixed in 1.39.6); from 1.40.0, before 1.40.2 (fixed in 1.40.2); from 1.41.0, before 1.41.1 (fixed in 1.41.1)

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