FreePBX up to 15.0.13/16.0.26/17.0.5 cross site scripting

Summaryinfo

A vulnerability was found in FreePBX up to 15.0.13/16.0.26/17.0.5. It has been classified as problematic. Affected by this issue is some unknown functionality. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2025-55209. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in FreePBX up to 15.0.13/16.0.26/17.0.5. It has been classified as problematic. This affects an unknown code block. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

contactmanager is a module for FreePBX@, which is an open source GUI that controls and manages Asterisk© (PBX). In versions 15.0.14 and below, 16.0.0 through 16.0.26.4 and 17.0.0 through 17.0.5, a stored cross-site scripting (XSS) vulnerability in FreePBX allows a low-privileged User Control Panel (UCP) user to inject malicious JavaScript into the system. The malicious code executes in the context of an administrator when they interact with the affected component, leading to session hijacking and potential privilege escalation. This issue is fixed in versions 15.0.14, 16.0.27 and 17.0.6.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-55209 since 08/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 15.0.14, 16.0.27 or 17.0.6 eliminates this vulnerability. Applying the patch 55abba0f1ab5d66ba87732fd06179231d1f68184 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• FreePBX

Version

• 15.0.0
• 15.0.1
• 15.0.2
• 15.0.3
• 15.0.4
• 15.0.5
• 15.0.6
• 15.0.7
• 15.0.8
• 15.0.9
• 15.0.10
• 15.0.11
• 15.0.12
• 15.0.13
• 16.0.0
• 16.0.1
• 16.0.2
• 16.0.3
• 16.0.4
• 16.0.5
• 16.0.6
• 16.0.7
• 16.0.8
• 16.0.9
• 16.0.10
• 16.0.11
• 16.0.12
• 16.0.13
• 16.0.14
• 16.0.15
• 16.0.16
• 16.0.17
• 16.0.18
• 16.0.19
• 16.0.20
• 16.0.21
• 16.0.22
• 16.0.23
• 16.0.24
• 16.0.25
• 16.0.26
• 17.0.0
• 17.0.1
• 17.0.2
• 17.0.3
• 17.0.4
• 17.0.5

License

• open-source

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CPE 2.2info

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