CVE-2025-7363 TitleIcon: Stored Cross-Site Scripting (XSS) via #titleicon_unicode parser function
Attackers can inject arbitrary JavaScript via the TitleIcon extension's parser function, potentially compromising user sessions and data.
- 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-2025-7363?
CVE-2025-7363 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - TitleIcon 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 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.
Weakness: CWE-79
Which versions are affected by CVE-2025-7363?
How do I fix CVE-2025-7363?
No fix has been published for CVE-2025-7363 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-2025-7363 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7363 exists.
Sources
Also known as GHSA-rxx8-835q-qmhv.