---
id: CVE-2026-54674
title: FreePBX is an open source IP PBX
summary: >-
  FreePBX is an open source IP PBX. Prior to versions 16.0.39 and 17.0.7, users
  authenticated via User Control Panel (UCP) are able to execute arbitrary
  commands on the PBX as the webserver user (typically asterisk) using specially
  crafted…
severity: high
cvss: 8.6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-78
vendor: FreePBX
product: security-reporting
affected:
  - security-reporting < 16.0.39
  - security-reporting < 17.0.7
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T19:16:49.493'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54674'
references:
  - url: >-
      https://github.com/FreePBX/security-reporting/security/advisories/GHSA-4jjr-8g5r-wv66
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-28T18:41:27.665514Z'
cvssSource: cna
ingestedAt: '2026-09-28T18:17:54.310Z'
---

## Overview

FreePBX is an open source IP PBX. Prior to versions 16.0.39 and 17.0.7, users authenticated via User Control Panel (UCP) are able to execute arbitrary commands on the PBX as the webserver user (typically asterisk) using specially crafted HTTP strings. Authenticated access to UCP is required. Note that this is often more common for less-privileged users to have UCP access vs. the Administrator Control Panel (ACP) access (which is usually FreePBX higher-level administrator accounts only). Insufficient sanitization of certain URL parameters utilized by UCP did not fully account for malicious strings in these fields. This could result in binaries being executed on the host server by carefully chaining commands. This issue has been patched in versions 16.0.39 and 17.0.7.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.