CVE-2025-6589

With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList

State: Published
Severity: 2.1 Low
Published: Feb 2, 2026
Updated: Mar 3, 2026
Reserved: Jun 24, 2025

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Description

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php.

This issue affects MediaWiki: >= 1.42.0.

Scores

CVSS	Score	Vector	Source
4.0	2.1 Low	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y	wikimedia-foundation

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
MediaWikiWikimedia Foundation	>= 1.42.0Affected

References

https://phabricator.wikimedia.org/T391343

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