CVE-2016-6334: Mediawiki

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the Parser::replaceInternalLinks2 method in MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 allows remote attackers to inject arbitrary web script or HTML via vectors involving replacement of percent encoding in unclosed internal links.

Affected products

• Mediawiki Mediawiki: up to and including 1.23.14; version 1.26.0 only; version 1.26.1 only; version 1.26.2 only; version 1.26.3 only; version 1.26.4 only; …

Published 2017-04-20. Last modified 2026-06-17.