CVE-2026-50592 Cross-site scripting in Znuny
Reflected XSS in the AdminCommunicationLog view allows attackers to execute arbitrary scripts in the context of other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50592?
CVE-2026-50592 is a medium-severity cross-site scripting vulnerability in Znuny, published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Znuny LTS before 6.5.21 and Znuny before 7.3.3, there is reflected XSS in
AdminCommunicationLog (aka the communication log administration view).
Weakness: CWE-79
Which versions are affected by CVE-2026-50592?
How do I fix CVE-2026-50592?
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-2026-50592 being exploited?
There is no known exploitation of CVE-2026-50592 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-50592, GHSA-fjc3-384j-842g, UBUNTU-CVE-2026-50592.