What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-09-25
• Weakness: CWE-287

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.

Affected products

• Sangoma FreePBX: before 16.0.44; from 17.0.1 before 17.0.23 — fixed in 16.0.44, 17.0.23

How to fix

Upgrade to a fixed version: Sangoma FreePBX 16.0.44, 17.0.23. Check the vendor advisory for mitigations.

References

• https://github.com/FreePBX/framework/commit/04224253156543cd9932b90458660b2f19fc0e35#diff-72f14a52840a61504a8e03cd195035b44e488aecd634b001bc6412a04bdc940bR20-R50
• https://github.com/FreePBX/security-reporting/security/advisories/GHSA-9jvh-mv6x-w698
• https://www.freepbx.org/watch-what-we-do-with-security-fixes-%f0%9f%91%80

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