High severity · published Jul 3, 2025
CVE-2025-6926
Security Authentication Bypass in CentralAuth
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
Improper Authentication vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows : Bypass Authentication.This issue affects Mediawiki - CentralAuth Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
Mediawiki - CentralAuth Extension · Wikimedia Foundation
1.39.x before 1.39.13; 1.42.x before 1.42.7; 1.43.x before 1.43.2 · source: vendor
Affected product
MC
Mediawiki - CentralAuth Extension
Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6926
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6926
gerrit.wikimedia.org
https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1165117
phabricator.wikimedia.org
https://phabricator.wikimedia.org/T389010
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/07/msg00012.html
More from Mediawiki - CentralAuth Extension
7.5
CVE-2026-100244
CentralAuth exposes locally suppressed block information via globaluserinfo API and Special:CentralAuth (incomplete fix for CVE-2025-62669)