CVE-2025-53502 HTML injection in FeaturedFeeds
An attacker can inject malicious HTML into FeaturedFeeds, potentially executing scripts or hijacking user sessions in MediaWiki installations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-53502?
CVE-2025-53502 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - FeaturedFeeds Extension, published on 3 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Input Validation vulnerability in Wikimedia Foundation Mediawiki - FeaturedFeeds Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - FeaturedFeeds Extension: 1.39.X, 1.42.X, 1.43.X.
Weakness: CWE-20
Which versions are affected by CVE-2025-53502?
How do I fix CVE-2025-53502?
No fix has been published for CVE-2025-53502 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-2025-53502 being exploited?
There is no known exploitation of CVE-2025-53502 in the wild and no public exploit code.
Sources
Also known as GHSA-h639-qx2x-fm8f.