PatchSiren cyber security CVE debrief

CVE-2026-50591 Znuny CVE debrief

CVE-2026-50591 is a medium-severity vulnerability with a CVSS score of 5.4. It affects Znuny LTS before 6.5.21 and Znuny before 7.3.3. The vulnerability allows for stored user preferences XSS attacks. The CVE was published on 2026-06-05T02:17:14.187Z and last modified on 2026-06-05T14:59:31.207Z.

Vendor: Znuny
Product: Unknown
CVSS: MEDIUM 5.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-05
Original CVE updated: 2026-06-05
Advisory published: 2026-06-05
Advisory updated: 2026-06-05

Who should care

Users of Znuny LTS before 6.5.21 and Znuny before 7.3.3 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by improper handling of stored user preferences in Znuny LTS and Znuny. This allows an attacker to inject malicious code, leading to XSS attacks.

Defensive priority

Medium

Recommended defensive actions

Update to Znuny LTS 6.5.21 or later and Znuny 7.3.3 or later.
Review and sanitize user preferences to prevent malicious code injection.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information is available at [ref-4].

Official resources

CVE-2026-50591 was published on 2026-06-05T02:17:14.187Z and last modified on 2026-06-05T14:59:31.207Z.