CVE-2026-40520

FreePBX prior to 17.0.9 has a vulnerability in the UCP Node server on ports 8001 and 8003, where the checkAuth middleware is applied only to the default Socket.IO namespace. An unauthenticated client can connect to custom namespaces and send crafted event values with CR/LF, allowing arbitrary commands to execute as the asterisk service user.

FreePBX from 16.0.0 until 16.0.11 and 17.0.4 has a vulnerability in the missedcall module, where the Caller ID name from crafted SIP From headers is inserted into an SQL query without escaping. An unauthenticated caller can inject SQL when a monitored extension goes unanswered, allowing modification of administrator accounts and unauthorized remote access.

A vulnerability in FreePBX from version 15.0.42 to before 16.0.45 and 17.0.7 allows unauthenticated users to access the User Control Panel (UCP) using hard-coded initial template credentials if the administrator did not change them immediately after enabling UCP. This issue is fixed in versions 16.0.45 and 17.0.7.

FreePBX from version 17.0.5.34 to 17.0.11 has a vulnerability in the publicKeySave AJAX endpoint in Backup.class.php, which accepts an administrator's SSH key and appends it to authorized_keys without reliably enforcing restrictions. The key grants persistent shell access with the ability to execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services.

FreePBX from version 17.0.1 to 17.0.7 has a vulnerability in the Music on Hold module that permits dangerous command-line options for /usr/bin/mpg123 and other allowed players. An administrator can use options that write files, open control channels, or create Asterisk call files, resulting in arbitrary command execution as the asterisk user.

FreePBX before versions 16.0.47 and 17.0.30 has a vulnerability in the Framework module that allows a crafted backup to restore the hidden AUTHTYPE setting with the value none. An authenticated user with backup-restore access can disable FreePBX authentication during restoration, bypassing the UI removal of AUTHTYPE=none.

FreePBX before versions 16.0.6 and 17.0.5.4 has a vulnerability in the Text-To-Speech module that allows an administrator to save a TTS destination name that is HTML-encoded, decoded during dialplan generation, passed as an AGI argument, and used to build filenames in agi-bin/propolys-tts.agi. The destination name reaches a raw shell-command execution path, allowing arbitrary OS command execution as the asterisk user.

In FreePBX prior to versions 16.0.22 and 17.0.5, the Dashboard module's getcontent AJAX handler includes PHP files based on user-supplied input without path sanitization. The $_REQUEST['rawname'] parameter is concatenated into an include() call with a .class.php suffix, allowing path traversal via ../ sequences to include arbitrary .class.php files from the filesystem. The included file's PHP code executes before the subsequent class instantiation error occurs.

The CDR Reports module in FreePBX before versions 16.0.50 and 17.0.11 contains an SQL injection vulnerability via the 'order' and 'sort' POST parameters. Authentication with a CDR section access account is required, but full admin privileges are not needed.

In FreePBX prior to 17.0.8, the OAuth2 implementation in the API module does not properly validate client credentials during token issuance. The validateClient() method in ClientRepository.php always returns true, allowing anyone with knowledge of a valid client_id to obtain OAuth2 access tokens without providing the correct client_secret.