CVE-2025-61651

i18n XSS through Special:CheckUser CheckUser helper

CVSS 0 NONEEPSS 0.2%CWE-79

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 0EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

03 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Wikimedia Foundation · CheckUser

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References

https://phabricator.wikimedia.org/T403408