The import.json.php file before 8.9 for Avideo is vulnerable to a File Deletion vulnerability. This allows the deletion of configuration.php, which leads to certain privilege checks not being in place, and therefore a user can escalate privileges to admin.
There was a local file disclosure vulnerability in AVideo < 8.9 via the proxy streaming. An unauthenticated attacker can exploit this issue to read an arbitrary file on the server. Which could leak database credentials or other sensitive information such as /etc/passwd file.