CVE-2025-62656

GlobalBlocking Special:GlobalBlockList vulnerable to message key stored XSS

State: Published
Severity: 5.8 Medium
Published: Oct 20, 2025
Updated: Oct 20, 2025
Reserved: Oct 17, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.8 Medium	CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/S:N/AU:N/R:U/V:C/RE:L/U:Amber	wikimedia-foundation

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
MediaWiki GlobalBlocking extensionThe Wikimedia Foundation	1.43Affected 1.44Affected

References

https://phabricator.wikimedia.org/T403291

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