CVE-2026-73660

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.

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Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

• 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