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.
History

Mon, 07 Jul 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 07 Jul 2025 18:30:00 +0000

Type Values Removed Values Added
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.
Title CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate via unsanitized i18n messages
Weaknesses CWE-79
References

cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published: 2025-07-07T18:16:33.919Z

Updated: 2025-07-07T20:49:34.393Z

Reserved: 2025-06-30T15:20:44.461Z

Link: CVE-2025-53478

cve-icon Vulnrichment

Updated: 2025-07-07T20:49:28.788Z

cve-icon NVD

Status : Received

Published: 2025-07-07T19:15:23.290

Modified: 2025-07-07T21:15:24.920

Link: CVE-2025-53478

cve-icon Redhat

No data.