CVE-2025-32077 XSSes in Extension:SimpleCalendar
Cross-site scripting vulnerability in MediaWiki SimpleCalendar extension allows attackers to inject malicious scripts, potentially compromising user sessions.
- 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-2025-32077?
CVE-2025-32077 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - Extension:SimpleCalendar, published on 11 Apr 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 The Wikimedia Foundation Mediawiki - Extension:SimpleCalendar allows Cross-Site Scripting (XSS).This issue affects Mediawiki - Extension:SimpleCalendar: from 1.39 through 1.43.
Weakness: CWE-20
Which versions are affected by CVE-2025-32077?
How do I fix CVE-2025-32077?
No fix has been published for CVE-2025-32077 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-2025-32077 being exploited?
There is no known exploitation of CVE-2025-32077 in the wild and no public exploit code.
Sources
Also known as GHSA-h4wc-9444-frmv.