CVE-2026-73664

FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module

State: Published
Severity: 8.6 High
Published: Aug 13, 2026
Updated: Aug 14, 2026
Reserved: Aug 13, 2026

Description

FreePBX is an open source IP PBX. From 17.0.5.34 until 17.0.11, the publicKeySave AJAX endpoint in Backup.class.php accepts an authenticated administrator's SSH public key and appends it to /home/asterisk/.ssh/authorized_keys for the asterisk system user without reliably enforcing backup-only command and source restrictions. The key grants persistent shell access that can execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services. This issue is fixed in version 17.0.11.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management
CWE-284 Improper Access Control
CWE-732 Incorrect Permission Assignment for Critical Resource

Affected Products

Product	Versions
backupFreePBX	>= 17.0.5.34, < 17.0.11Affected

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-24w6-hpg3-rwfg

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