CVE-2025-57819: Sangoma FreePBX Authentication Bypass Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2025-08-29. EPSS: 86.3% chance of exploitation in the next 30 days.

FreePBX is an open-source web-based graphical user interface. FreePBX 15, 16, and 17 endpoints are vulnerable due to insufficiently sanitized user-supplied data allowing unauthenticated access to FreePBX Administrator leading to arbitrary database manipulation and remote code execution. This issue has been patched in endpoint versions 15.0.66, 16.0.89, and 17.0.3.

Affected products

• Sangoma FreePBX: from 15.0, before 15.0.66 (fixed in 15.0.66); from 16.0, before 16.0.89 (fixed in 16.0.89); from 17.0, before 17.0.3 (fixed in 17.0.3)

Published 2025-08-28. Last modified 2026-09-26.