CVE-2025-6589 LOW

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

Vendor Wikimedia Foundation
Product MediaWiki
Published February 2, 2026
Last update March 3, 2026
View on NVD All CVEs

CVSS base score

2.1/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php. This issue affects MediaWiki: >= 1.42.0.

Key dates

02Disclosure timeline

February 2, 2026 CVE published
March 3, 2026 Record updated