Medium severity5.4NVD Advisory· Published Jul 8, 2025· Updated Jun 17, 2026
CVE-2025-53479
CVE-2025-53479
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- Range: >=1.42.0,<1.42.7, >=1.43.0,<1.43.2
- Range: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2
- Range: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2
Patches
Vulnerability mechanics
References
2News mentions
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