XSS in Znuny

CVE-2025-43926

An issue was discovered in Znuny through 6.5.14 and 7.x through 7.1.6. Custom AJAX calls to the AgentPreferences UpdateAJAX subaction can be used to set user preferences with arbitrary keys. When fetching user data via GetUserData, these keys and values are retrieved and given as a whole to other function calls, which then might use these keys/values to affect permissions or other settings.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

  • Znuny
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-43926?
CVE-2025-43926 is a medium-severity vulnerability in Znuny, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-05-08.
How severe is CVE-2025-43926?
Medium severity. CVSS v3 base score is 6.1 out of 10.