CVE-2026-28209 PUBLISHED

FreePBX: Command Injection leading to Remote Code Execution in FreePBX ElevenLabs Text-to-Speech integration

Assigner: GitHub_M
Reserved: 25.02.2026 Published: 05.03.2026 Updated: 07.03.2026

FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, a command injection vulnerability exists in FreePBX when using the ElevenLabs Text-to-Speech (TTS) engine in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	FreePBX
Product	security-reporting
Versions	Version >= 16.0.17.2, < 16.0.20 is affected Version >= 17.0.2.4, < 17.0.5 is affected

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-f558-mp87-58vj

Problem Types

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE