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Vulnerability record · CVE-2021-45461 · published 22 December 2021

CVE-2021-45461: Sangoma restapps vulnerability

Sangoma · Restapps

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.

9.8 CVSS 3.1 Critical EPSS 22% · top 2.4%
9.8CVSS 3.1 base score, v2 7.5
22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://community.freepbx.org/t/0-day-freepbx-exploit/80092 ExploitIssue TrackingVendor Advisory
https://community.freepbx.org/t/security-issue-potential-rest-phone-apps-rce/80109 Vendor Advisory
https://wiki.freepbx.org/display/FOP/2021-12-21+SECURITY%3A+Potential+Rest+Phone+Apps+RCE Vendor Advisory
https://community.freepbx.org/t/0-day-freepbx-exploit/80092 ExploitIssue TrackingVendor Advisory
https://community.freepbx.org/t/security-issue-potential-rest-phone-apps-rce/80109 Vendor Advisory
https://wiki.freepbx.org/display/FOP/2021-12-21+SECURITY%3A+Potential+Rest+Phone+Apps+RCE Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-10666Sangoma restapps command injection vulnerabilityThe restapps (aka Rest Phone apps) module for Sangoma FreePBX and PBXact 13, 14, and 15 through 15.0.19.2 allows remote code execution via a URL vari…EPSS 2.2%

Source: NIST National Vulnerability Database (record CVE-2021-45461), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.