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Vulnerability record · CVE-2025-66039 · published 9 December 2025

CVE-2025-66039: Sangoma freepbx improper authentication vulnerability

Sangoma · Freepbx

FreePBX Endpoint Manager is a module for managing telephony endpoints in FreePBX systems. Versions are vulnerable to authentication bypass when the authentication type is set to "webserver." When providing an Authorization header with an arbitrary value, a session is associated with the target user regardless of valid credentials. This issue is fixed in versions 16.0.44 and 17.0.23.

9.3 CVSS 4.0 Critical EPSS 3.3% · top 12.0% CWE-287 · Improper authentication
9.3CVSS 4.0 base score
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
25 Sep 2026Last modified by NVD

Description

FreePBX Endpoint Manager is a module for managing telephony endpoints in FreePBX systems. Versions are vulnerable to authentication bypass when the authentication type is set to "webserver." When providing an Authorization header with an arbitrary value, a session is associated with the target user regardless of valid credentials. This issue is fixed in versions 16.0.44 and 17.0.23.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/FreePBX/framework/commit/04224253156543cd9932b90458660b2f19fc0e35#diff-72f14a52840a61504a8e03cd195035 Product
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-9jvh-mv6x-w698 MitigationVendor Advisory
https://www.freepbx.org/watch-what-we-do-with-security-fixes-%f0%9f%91%80 Not ApplicableVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-57819FreePBX unauthenticated SQL injection and auth bypass to RCEFreePBX 15, 16 and 17 fail to sanitize user-supplied data, letting an unauthenticated attacker bypass authentication to the FreePBX Administrator int…KEVEPSS 85%analysed9.8CVE-2019-19006Sangoma FreePBX improper authentication allows remote admin bypassFreePBX versions 115.0.16.26, 14.0.13.11, 13.0.197.13 and below contain an incorrect access control flaw (CWE-287 improper authentication) that lets …KEVEPSS 56%analysed10.0CVE-2014-7235Freepbx code injection vulnerabilityhtdocs_ari/includes/login.php in the ARI Framework module/Asterisk Recording Interface (ARI) in FreePBX before 2.9.0.9, 2.10.x, and 2.11 before 2.11.…EPSS 43%9.8CVE-2020-36630Sangoma freepbx sql injection vulnerabilityA vulnerability was found in FreePBX cdr 14.0. It has been classified as critical. This affects the function ajaxHandler of the file ucp/Cdr.class.ph…EPSS 0.68%9.3CVE-2026-46376Sangoma freepbx hard-coded credentials vulnerabilityFreePBX is an open source IP PBX. From 15.0.42 to before 16.0.45 and 17.0.7, unauthenticated users may be able to access the User Control Panel (UCP)…EPSS 0.50%8.8CVE-2023-43336Sangoma freepbx improper access control vulnerabilitySangoma Technologies FreePBX before cdr 15.0.18, 16.0.40, 15.0.16, and 16.0.17 was discovered to contain an access control issue via a modified param…EPSS 0.72%8.7CVE-2024-58294Sangoma freepbx os command injection vulnerabilityFreePBX 16 contains an authenticated remote code execution vulnerability in the API module that allows attackers with valid session credentials to ex…EPSS 3.6%8.6CVE-2026-28287Sangoma freepbx os command injection vulnerabilityFreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, multiple command injection vu…EPSS 1.5%

Source: NIST National Vulnerability Database (record CVE-2025-66039), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.