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

Published Feb 2, 2026 CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
Weaknesses CWE-22
Type Values Removed Values Added
First Time appeared Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki
Vendors & Products Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList
References
Metrics cvssV4_0

{'score': 2.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Mar 3, 2026, 3:37 PM
Reserved
Jun 24, 2025, 10:27 PM
Status
Deferred
Published
Feb 2, 2026, 11:16 PM
Modified
Jun 17, 2026, 10:02 AM