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Status published
Unknown
CVE-2025-53478
CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate via unsanitized i18n messages
Vulnerability Description
The CheckUser extension’s Special:Investigate interface is vulnerable to reflected XSS due to improper escaping of certain internationalized system messages rendered on the “IPs and User agents” tab. This issue affects Mediawiki - CheckUser extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Low
2.3
Affected Vendor
Wikimedia Foundation
View all reports →Affected Software
Mediawiki - CheckUser extension
Vulnerable Versions:
1.39.x, 1.42.x, 1.43.x
Timeline
Official Publish:
July 7th, 2025
Last Modified:
July 7th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
No vector data available