CVE-2025-67478

HIGH

Wikimedia Foundation CheckUser <1.39.14-1.44.1 - Info Disclosure

Title source: llm
STIX 2.1

Description

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php. This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.

References (1)

Core 1
Core References

Scores

CVSS v3 8.8
EPSS 0.0001
EPSS Percentile 2.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

Status published
Products (3)
mediawiki/checkuser 1.44.0
mediawiki/checkuser 1.39.0 - 1.39.14
Wikimedia Foundation/CheckUser < 1.39.14, 1.43.4, 1.44.1
Published Feb 03, 2026
Tracked Since Feb 18, 2026