CVE-2025-66039
FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header
- Published
- Dec 9, 2025
- Updated
- Feb 26, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 4.0
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:X/V:X/RE:X/U:XLow · next 30 days
- Percentile
- 88.2%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
modules/auxiliary/gather/freepbx_custom_extension_injection.rb
Metasploit Framework modulesDeclared conditions
- verification: check_declared($.auxiliary_gather/freepbx_custom_extension_injection.check)
modules/exploits/unix/http/freepbx_custom_extension_rce.rb
Metasploit Framework modulesDeclared conditions
- platform: Linux($.exploit_unix/http/freepbx_custom_extension_rce.platform)
- verification: check_declared($.exploit_unix/http/freepbx_custom_extension_rce.check)
modules/exploits/unix/http/freepbx_firmware_file_upload.rb
Metasploit Framework modulesDeclared conditions
- platform: PHP($.exploit_unix/http/freepbx_firmware_file_upload.platform)
- verification: check_declared($.exploit_unix/http/freepbx_firmware_file_upload.check)
Responsible use
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