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CVE-2025-7362: MsUpload: Stored Cross-Site Scripting (XSS) via unsanitized msu-continue system message
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.
Classification
CVE ID: CVE-2025-7362
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')Affected Products
Vendor: Wikimedia Foundation
Product: Mediawiki - MsUpload extension
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 6.3% (scored less or equal to compared to others)
EPSS Date: 2025-07-10 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-7362https://phabricator.wikimedia.org/T394864
https://gerrit.wikimedia.org/r/q/Icf4c0a5a936926ea887ca2e48c3a7bd297201d9f