In FusionPBX up to v4.5.7, the file app\conferences_active\conference_interactive.php uses an unsanitized "c" variable coming from the URL, which is reflected in HTML, leading to XSS.

In FusionPBX up to v4.5.7, the file resources\download.php uses an unsanitized "f" variable coming from the URL, which takes any pathname and allows a download of it. (resources\secure_download.php is also affected.)

In FusionPBX up to v4.5.7, the file app\contacts\contact_urls.php uses an unsanitized "id" variable coming from the URL, which is reflected in HTML, leading to XSS.

In FusionPBX up to v4.5.7, the file app\call_broadcast\call_broadcast_edit.php uses an unsanitized "id" variable coming from the URL in an unparameterized SQL query, leading to SQL injection.

In FusionPBX up to v4.5.7, the file app/music_on_hold/music_on_hold.php uses an unsanitized "file" variable coming from the URL, which takes any pathname (base64 encoded) and allows a download of it.

In FusionPBX up to v4.5.7, the file app\devices\device_settings.php uses an unsanitized "id" variable coming from the URL, which is reflected on 2 occasions in HTML, leading to XSS.

FusionPBX 4.4.8 allows an attacker to execute arbitrary system commands by submitting a malicious command to the service_edit.php file (which will insert the malicious command into the database). To trigger the command, one needs to call the services.php file via a GET request with the service id followed by the parameter a=start to execute the stored command.

app/operator_panel/exec.php in the Operator Panel module in FusionPBX 4.4.3 suffers from a command injection vulnerability due to a lack of input validation that allows authenticated non-administrative attackers to execute commands on the host. This can further lead to remote code execution when combined with an XSS vulnerability also present in the FusionPBX Operator Panel module.

app/backup/index.php in the Backup Module in FusionPBX 4.4.3 suffers from a command injection vulnerability due to a lack of input validation, which allows authenticated administrative attackers to execute commands on the host.

XSS in app/operator_panel/index_inc.php in the Operator Panel module in FusionPBX 4.4.3 allows remote unauthenticated attackers to inject arbitrary JavaScript characters by placing a phone call using a specially crafted caller ID number. This can further lead to remote code execution by chaining this vulnerability with a command injection vulnerability also present in FusionPBX.