CVE-2025-66039

FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header

9.3 CriticalPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.39%Up 3.3 points since Dec 10, 2025

What each source reports

CVE List Score used 9.3

FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header

Record: CVE-2025-66039
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-287
Updated: 2026-11-02

EUVDEUVD-2025-202329 9.3

Record: EUVD-2025-202329
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

NVD 9.3

Record: CVE-2025-66039
CVSS 4.0: 9.3 CriticalCVSS: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:X/V:X/RE:X/U:X
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-287
Updated: 2026-11-02

OSV 9.3

FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header

Record: CVE-2025-66039
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-287
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	FreePBX Custom Extension SQL Injection	2025-12-11
Metasploit	FreePBX endpoint SQLi to RCE	2025-12-11
Metasploit	FreePBX firmware file upload	2025-12-11
PoC in GitHub	BimBoxH4/CVE-2025-66039_CVE-2025-61675_CVE-2025-61678_reePBX	2025-12-14
PoC in GitHub	cyberleelawat/FreePBX-Multiple-CVEs-2025	2025-12-16

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, Metasploit, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-66039 is a critical vulnerability (CVSS 9.3) in Sangoma Freepbx, published December 9, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.39%, the 88th percentile. No source names a fixed version.