What’s Vulnerable › Vulnerabilities

CVE-2026-73660: FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

• Severity: high (CVSS 7.5 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-10-24
• Weakness: CWE-78

Description

FreePBX is an open source IP PBX. Prior to 16.0.6 and 17.0.5.4, the FreePBX Text-To-Speech module allows an authenticated administrator to save a TTS destination name that is HTML-encoded for storage, decoded during dialplan generation, passed as an AGI argument, and used to build filenames inside agi-bin/propolys-tts.agi. The TTS destination name reaches a raw shell-command execution path, allowing arbitrary operating-system command execution as the asterisk service user. This issue is fixed in versions 16.0.6 and 17.0.5.4.

Affected products

• FreePBX tts: before 16.0.6; from 17.0.1, < 17.0.5.4

References

• https://github.com/FreePBX/security-reporting/security/advisories/GHSA-hg3v-m857-mvw9
• https://github.com/FreePBX/tts/commit/37cf0dd3e9ceb4a32e09a2fca6a145320245c0a0
• https://github.com/FreePBX/tts/commit/4057410439e66d8be2b47c6358de5fab498bbc21

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