CVE-2025-61648

Stored XSS through system messages in CheckUser

State: Published
Severity: 0.0 None
Published: Feb 3, 2026
Updated: Feb 3, 2026
Reserved: Sep 29, 2025

Description

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.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js.

This issue affects CheckUser: from * before 1.44.1.

Scores

CVSS	Score	Vector	Source
4.0	0.0 None	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U	wikimedia-foundation

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
CheckUserWikimedia Foundation	before 1.44.1Affected

References

https://phabricator.wikimedia.org/T402077

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