CVE-2025-43926: znuny XSS — Fix

Description

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.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
znuny	znuny	< 6.5.14
znuny	znuny	7.0.1 — 7.1.6

References

Advisories & Patches

https://www.znuny.org/en/advisories/zsa-2025-07

Other References

https://znuny.com

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-43926? +

CVE-2025-43926 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-43926? +

CVE-2025-43926 affects products from znuny, specifically: znuny. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-43926? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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