CVE-2025-55209: FreePBX UCP is Vulnerable to Stored XSS Through its User Control Panel

Medium severity · published Sep 4, 2025

CVE-2025-55209

FreePBX UCP is Vulnerable to Stored XSS Through its User Control Panel

5.1

CVSS

0.4%

EPSS

On KEV

Description

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.

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 29% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

contactmanager · FreePBX

< 15.0.14; >= 16.0.0, < 16.0.27; >= 17.0.0, < 17.0.6 · source: vendor

Affected product

contactmanager