CVE-2021-45461: Sangoma Restapps

Critical severity, CVSS 9.8. EPSS: 21.7% chance of exploitation in the next 30 days.

FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.

Affected products

• Sangoma Restapps: version 15.0.19.87 only; version 15.0.19.88 only; version 16.0.18.40 only; version 16.0.18.41 only

Published 2021-12-22. Last modified 2026-06-17.