CVE-2025-53491 XSS in FlaggedRevs
Cross-site scripting vulnerability in the MediaWiki FlaggedRevs extension allows attackers to inject malicious scripts into web pages viewed by other users.
- 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-2025-53491?
CVE-2025-53491 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - FlaggedRevs Extension, published on 7 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
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - FlaggedRevs Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - FlaggedRevs Extension: from 1.43.X before 1.43.2.
Weakness: CWE-79
Which versions are affected by CVE-2025-53491?
How do I fix CVE-2025-53491?
No fix has been published for CVE-2025-53491 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-2025-53491 being exploited?
There is no known exploitation of CVE-2025-53491 in the wild and no public exploit code.
Sources
Also known as GHSA-8733-8379-6x8g.