Description
The MsUpload extension for MediaWiki is vulnerable to stored XSS via the msu-continue system message, which is inserted into the DOM without proper sanitization. The vulnerability occurs in the file upload UI when the same filename is uploaded twice.
This issue affects Mediawiki - MsUpload 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.
Metrics
CVSS 3.1 5.4/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | Mediawiki - MsUpload extension | >= 1.39.x, < 1.39.13; >= 1.42.x, < 1.42.7; >= 1.43.x, < 1.43.2 |
References
Timeline
- Published
- Jul 8, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Deferred