Vulnerability Monitor

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CVE-2025-53479

The CheckUser extension’s Special:CheckUser interface is vulnerable to reflected XSS via the rev-deleted-user message. This message is rendered without proper escaping, making it possible to inject JavaScript through the uselang=x-xss language override mechanism. This issue affects Mediawiki - CheckUser extension: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Published

2025-07-08T18:15:40.387

Last Modified

2025-07-10T14:15:26.257

Status

Awaiting Analysis

Source

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Severity

CVSSv3.1: 5.4 (MEDIUM)

Weaknesses
  • Type: Secondary
    CWE-79
Affected Vendors & Products

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References