FreePBX Servers Targeted by Zero-Day Flaw, Emergency Patch Now Available
Aug 29, 2025
Zero-Day / Vulnerability
The Sangoma FreePBX Security Team has issued an advisory warning about an actively exploited FreePBX zero-day vulnerability that impacts systems with an administrator control panel (ACP) exposed to the public internet. FreePBX is an open-source private branch exchange (PBX) platform widely used by businesses, call centers, and service providers to manage voice communications. It's built on top of Asterisk , an open-source communication server. The vulnerability, assigned the CVE identifier CVE-2025-57819 , carries a CVSS score of 10.0, indicating maximum severity. "Insufficiently sanitized user-supplied data allows unauthenticated access to FreePBX Administrator, leading to arbitrary database manipulation and remote code execution," the project maintainers said in an advisory. The issue impacts the following versions - FreePBX 15 prior to 15.0.66 FreePBX 16 prior to 16.0.89, and FreePBX 17 prior to 17.0.3 Sangoma said an unauthorized user began accessing mult...
