CVE-2025-55209

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

MEDIUM

5.1

CVSS Score

Published: September 4, 2025 at 10:50 PM UTC

Updated: June 17, 2026 at 09:41 AM UTC

1 product affected across 1 vendorContactmanager

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Severity

MEDIUM5.1

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Contactmanager · Freepbx

60%

v < 15.0.14v < 16.0.27v < 17.0.6

Affected range stops below 15.0.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.0.27, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISC

Source: [email protected]

https://github.com/FreePBX/contactmanager/commit/55abba0f1ab5d66ba87732fd06179231d1f68184

x_refsource_CONFIRM

Source: [email protected]

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-j654-x3q2-6wm3

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.1MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-79

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