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CVE-2025-7363: TitleIcon: Stored Cross-Site Scripting (XSS) via #titleicon_unicode parser function
Description
The TitleIcon extension for MediaWiki is vulnerable to stored XSS through the #titleicon_unicode parser function. User input passed to this function is wrapped in an HtmlArmor object without sanitization and rendered directly into the page header, allowing attackers to inject arbitrary JavaScript.
This issue affects Mediawiki - TitleIcon 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-2025-7363
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')Affected Products
Vendor: Wikimedia Foundation
Product: Mediawiki - TitleIcon extension
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 5.44% (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-2025-7363https://phabricator.wikimedia.org/T394721
https://gerrit.wikimedia.org/r/q/I107ab638fecbf52b5bec3f02726ed24b1ae74429
https://gerrit.wikimedia.org/r/q/I2e8c73445172679634f6ec64d37cf82507dfa110