Vulnerability · Published Jul 8, 2025 · Assigned by wikimedia-foundation

CVE-2025-7363TitleIcon: Stored Cross-Site Scripting (XSS) via #titleicon_unicode parser function

Medium 5.4

In plain English

A medium-severity cross-site scripting in Mediawiki - TitleIcon extension from Wikimedia Foundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 83.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Wikimedia Foundation	Mediawiki - TitleIcon extension	1.39.x – before 1.39.131.42.x – before 1.42.71.43.x – before 1.43.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References