Znuny up to 6.5.20/7.3.2 Communication cross site scripting

Summaryinfo

A vulnerability was found in Znuny up to 6.5.20/7.3.2. It has been declared as problematic. Affected by this issue is some unknown functionality of the component Communication Handler. Such manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-50592. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Znuny up to 6.5.20/7.3.2. It has been rated as problematic. Affected by this issue is some unknown processing of the component Communication Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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).

The advisory is shared for download at znuny.org. This vulnerability is handled as CVE-2026-50592 since 06/05/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 318741 (Linux Distros Unpatched Vulnerability : CVE-2026-50592), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.5.21 or 7.3.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318741) and EUVD (EUVD-2026-34783). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Znuny

Version

• 6.5.0
• 6.5.1
• 6.5.2
• 6.5.3
• 6.5.4
• 6.5.5
• 6.5.6
• 6.5.7
• 6.5.8
• 6.5.9
• 6.5.10
• 6.5.11
• 6.5.12
• 6.5.13
• 6.5.14
• 6.5.15
• 6.5.16
• 6.5.17
• 6.5.18
• 6.5.19
• 6.5.20
• 7.3.0
• 7.3.1
• 7.3.2

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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