CVE-2025-61650: Wikimedia Foundation Checkuser

Low severity, CVSS 1.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Wikimedia Foundation Checkuser: before 795bf333272206a0189050d975e94b70eb7dc507 (fixed in 795bf333272206a0189050d975e94b70eb7dc507)

Published 2026-02-03. Last modified 2026-06-17.