MsUpload Extension up to 1.39.12/1.42.6/1.43.1 on MediaWiki msu-continue System Message cross site scripting

Summaryinfo

A vulnerability was found in MsUpload Extension up to 1.39.12/1.42.6/1.43.1 on MediaWiki. It has been rated as problematic. This affects an unknown part of the component msu-continue System Message Handler. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2025-7362. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in MsUpload Extension up to 1.39.12/1.42.6/1.43.1 on MediaWiki and classified as problematic. This issue affects an unknown function of the component msu-continue System Message Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at phabricator.wikimedia.org. The identification of this vulnerability is CVE-2025-7362 since 07/08/2025. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 1.39.13, 1.42.7 or 1.43.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-20664). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• MsUpload Extension

Version

• 1.39.0
• 1.39.1
• 1.39.2
• 1.39.3
• 1.39.4
• 1.39.5
• 1.39.6
• 1.39.7
• 1.39.8
• 1.39.9
• 1.39.10
• 1.39.11
• 1.39.12
• 1.42.0
• 1.42.1
• 1.42.2
• 1.42.3
• 1.42.4
• 1.42.5
• 1.42.6
• 1.43.0
• 1.43.1

CPE 2.3info

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• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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