CVE-2025-7362 MsUpload: Stored Cross-Site Scripting (XSS) via unsanitized msu-continue system message
Attackers can inject malicious scripts via unsanitized upload messages, potentially hijacking user sessions in MediaWiki installations using the MsUpload extension.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-7362?
CVE-2025-7362 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - MsUpload extension, published on 8 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2025-7362?
How do I fix CVE-2025-7362?
No fix has been published for CVE-2025-7362 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-7362 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7362 exists.
Sources
Also known as GHSA-pqmg-6grf-rg8c.