CVE-2025-52204 Cross-site scripting in n/a
An XSS vulnerability in Znuny ITSM allows attackers to inject scripts via the customer interface, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-52204?
CVE-2025-52204 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A Cross-Site Scripting (XSS) vulnerability exists in Znuny::ITSM 6.5.x in the customer.pl endpoint via the OTRSCustomerInterface parameter
Weakness: CWE-79
Which versions are affected by CVE-2025-52204?
How do I fix CVE-2025-52204?
Upgrade to a fixed version.
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-2025-52204 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-52204 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2025-52204, GHSA-79wq-mgjf-5cc2, UBUNTU-CVE-2025-52204.