Multiple security vulnerabilities have been disclosed in the open-source private branch exchange (PBX) platform FreePBX, including a critical flaw that could result in an authentication bypass under certain configurations.
The shortcomings, discovered by Horizon3.ai and reported to the project maintainers on September 15, 2025, are listed below –

CVE-2025-61675 (CVSS score: 8.6) – Numerous