CVE-2025-52133 Cross-site scripting in Mocca Calendar
An attacker can execute arbitrary scripts in the context of other users via a malicious calendar import title in the Mocca Calendar application.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-52133?
CVE-2025-52133 is a medium-severity cross-site scripting vulnerability in xwiki-contrib Mocca Calendar, published on 3 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Mocca Calendar application before 2.15 for XWiki allows XSS via a title upon calendar import.
Weakness: CWE-79
Which versions are affected by CVE-2025-52133?
How do I fix CVE-2025-52133?
No fix has been published for CVE-2025-52133 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-2025-52133 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-52133 exists.
Sources
Also known as GHSA-mc3x-h7p6-334p.