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Vulnerabilities

Security fix · CVE-2025-66039

FreePBX Endpoint Manager is a module for managing telephony endpoints in FreePBX systems.

Published Dec 9, 2025 · catalog updated Feb 26, 2026 · FreePBX

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-66039. EPSS is 3.39%. Act only if a listed version of FreePBX is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.39%
Remediation
Version ranges on file
Affected products
vendor FreePBX framework 17.0.1, < 17.0.23

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor FreePBX framework 17.0.1, < 17.0.2317.0.1, < 17.0.23

How to fix CVE-2025-66039

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-66039. EPSS is 3.39%. Act only if a listed version of FreePBX is installed.

Which versions are affected?

Compare what you have installed with FreePBX framework 17.0.1, < 17.0.23 17.0.1, < 17.0.23. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 3.39%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 9, 2025 · EUVD

    Detected

    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.

  2. Feb 26, 2026 · EUVD

    Updated

    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

  • CVE.orgVulnerability recordCVE-2025-66039

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-66039

    30-day exploitation probability 3.39%

    first.org
  • EUVDVulnerability recordEUVD-2025-202329

    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 w

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleauxiliary_gather/freepbx_custom_extension_injection

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit ModulesPublic exploit moduleexploit_unix/http/freepbx_custom_extension_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • Metasploit ModulesPublic exploit moduleexploit_unix/http/freepbx_firmware_file_upload

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesNov 3, 2026
  • Metasploit ModulesNov 3, 2026
  • Metasploit ModulesNov 3, 2026
  • FIRST EPSSNov 2, 2026
  • CVE.orgOct 27, 2026
  • EUVDOct 26, 2026