VYPR
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

Patches

Vulnerability mechanics

References

2

News mentions

0

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