Permissions, Privileges, and Access Controls in MediaWiki - CVE-2025-6589
Published: August 7, 2025
Vulnerability identifier: #VU113743
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2025-6589
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: MediaWiki.org
Affected software:
MediaWiki
MediaWiki
Detailed vulnerability description
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.
How to mitigate CVE-2025-6589
Install updates from vendor's website.