PT-2026-5739 · Wikimedia Foundation · Checkuser

Published 2026-02-03 · Updated 2026-02-03 · CVE-2025-61651

Mitre

CVSS v4.0

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser/checkuser/checkUserHelper/buildUserElement.Js.

This issue affects CheckUser: from * before 1.44.1.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-61651

Affected Products

Checkuser

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2025-61651 · Security Note
• https://phabricator.wikimedia.org/T403408 · Note