XSS in Znuny

CVE-2026-50592

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).

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Znuny — versions 0, 7.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-50592?: CVE-2026-50592 is a medium-severity vulnerability in Znuny, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-06-05.
How severe is CVE-2026-50592?: Medium severity. CVSS v3 base score is 6.4 out of 10.