Vulnerability · Published Feb 3, 2026 · Assigned by wikimedia-foundation

CVE-2025-61650UserInfoCard is vulnerable to message key stored XSS

Low 1.1

In plain English

A low-severity cross-site scripting in CheckUser from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 4.0)1.1Low

Exploit odds (30 days)0.3%top 78.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 src/Services/CheckUserUserInfoCardService.Php. This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.

Affected products (as reported)

Vendor	Product	Versions
Wikimedia Foundation	CheckUser	* – before 795bf333272206a0189050d975e94b70eb7dc507

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

References

https://phabricator.wikimedia.org/T403289