XSS Vulnerability in Wikimedia Foundation CheckUser Product
CVE-2025-61650

1.1LOW

Key Information:

Vendor

Wikimedia Foundation

Status
Checkuser
Vendor
CVE Published:
3 February 2026

What is CVE-2025-61650?

The CheckUser product from Wikimedia Foundation has a vulnerability where improper neutralization of user input during web page generation could allow attackers to execute arbitrary scripts in the context of another user's session. This issue particularly concerns versions prior to a specific commit, highlighting the importance of secure coding practices and diligent software updates to mitigate risks associated with user-generated content.

Affected Version(s)

CheckUser * < 795bf333272206a0189050d975e94b70eb7dc507

References

https://phabricator.wikimedia.org/T403289

CVSS V4

Score:
1.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.