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)

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (14.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-50592: held from 0.001 to 0.002.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

  • Znuny — versions 0, 7.0.0

Weakness classification (CWE)

References

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.