Permissions, Privileges, and Access Controls in MediaWiki - CVE-2025-6589
Published: August 7, 2025
Vulnerability identifier: #VU113743
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-6589
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to incorrect implementation of the Special:BlockList feature. A remote user blocked with a hideuser block on a wiki with MultiBlocks enabled can view hidden usernames.
Affected software
MediaWiki
How to mitigate CVE-2025-6589
Install updates from vendor's website.
MediaWiki - addressed in versions 1.39.13, 1.42.7, 1.43.2