CVE-2025-62656: The Wikimedia Foundation Mediawiki Globalblocking Extension

Medium severity, CVSS 5.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki GlobalBlocking extension: 1.43, 1.44.

Affected products

• The Wikimedia Foundation Mediawiki Globalblocking Extension: version 1.43 only; version 1.44 only

Published 2025-10-20. Last modified 2026-10-08.