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CVE-2025-66039— FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header

Quick assessment

Affected
FreePBX framework
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreePBX Endpoint Manager是FreePBX开源的一款集中管理IP电话终端配置模块。 FreePBX Endpoint Manager存在授权问题漏洞，该漏洞源于身份验证绕过，可能导致未经授权的访问。

AI Predicted 9.8 Difficulty: Easy EPSS 3.28% · P88

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-66039

Vulnerability Information
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Vulnerability Title
FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreePBX Endpoint Manager 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreePBX Endpoint Manager是FreePBX开源的一款集中管理IP电话终端配置模块。 FreePBX Endpoint Manager存在授权问题漏洞，该漏洞源于身份验证绕过，可能导致未经授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreePBX framework < 16.0.44 -

II. Public POCs for CVE-2025-66039

# POC Description Source Link Shenlong Link
1 This vulnerability allows both authenticated and unauthenticated remote attackers to execute remote code on vulnerable FreePBX instances. These issues have been fixed in FreePBX versions 16.0.42, 16.0.92, 17.0.6, and 17.0.22. It's important to note that this authentication bypass vulnerability is not present in the default FreePBX configuration. https://github.com/BimBoxH4/CVE-2025-66039_CVE-2025-61675_CVE-2025-61678_reePBX POC Details
2 This repository documents three security vulnerabilities discovered in FreePBX (CVE-2025-66039, CVE-2025-61678, CVE-2025-61675), including analysis, impact, and proof-of-concept details for security research and awareness purposes. https://github.com/cyberleelawat/FreePBX-Multiple-CVEs-2025 POC Details
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III. Intelligence Information for CVE-2025-66039

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Patches & Fixes for CVE-2025-66039 (1)

Vendor Advisories for CVE-2025-66039 (1)

IV. Related Vulnerabilities

Same product: framework
Same vendor: FreePBX
Same weakness: CWE-287

V. Comments for CVE-2025-66039

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