The CheckUser extension’s Special:Investigate page has a vulnerability in the Account information tab, where specific internationalized messages are rendered without proper escaping. Attackers can exploit this by appending ?uselang=x-xss to the URL, causing reflected XSS when the UI renders affected message keys.
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.
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History
Tue, 08 Jul 2025 21:15:00 +0000
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Tue, 08 Jul 2025 15:15:00 +0000
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| Description | The CheckUser extension’s Special:Investigate page has a vulnerability in the Account information tab, where specific internationalized messages are rendered without proper escaping. Attackers can exploit this by appending ?uselang=x-xss to the URL, causing reflected XSS when the UI renders affected message keys. 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 (Account information tab) via unsanitized i18n messages | |
| Weaknesses | CWE-79 | |
| References |
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Status: PUBLISHED
Assigner: wikimedia-foundation
Published: 2025-07-08T14:58:37.544Z
Updated: 2025-07-08T20:44:54.968Z
Reserved: 2025-06-30T15:20:44.461Z
Link: CVE-2025-53480
Updated: 2025-07-08T20:44:50.742Z
Status : Awaiting Analysis
Published: 2025-07-08T15:15:29.720
Modified: 2025-07-08T21:15:28.227
Link: CVE-2025-53480
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