QuickBox Pro v2.4.8 contains a cross-site scripting (XSS) vulnerability at "adminuseredit.php?usertoedit=XSS", as the user supplied input for the value of this parameter is not properly sanitized.

In QuickBox Pro v2.5.8 and below, the config.php file has a variable which takes a GET parameter value and parses it into a shell_exec(''); function without properly sanitizing any shell arguments, therefore remote code execution is possible. Additionally, as the media server is running as root by default attackers can use the sudo command within this shell_exec(''); function, which allows for privilege escalation by means of RCE.

In QuickBox Community Edition through 2.5.5 and Pro Edition through 2.1.8, the local www-data user has sudo privileges to execute grep as root without a password, which allows an attacker to obtain sensitive information via a grep of a /root/*.db or /etc/shadow file.

In QuickBox Community Edition through 2.5.5 and Pro Edition through 2.1.8, the local www-data user can execute sudo mysql without a password, which means that the www-data user can execute arbitrary OS commands via the mysql -e option.

QuickBox Community Edition through 2.5.5 and Pro Edition through 2.1.8 allows an authenticated remote attacker to execute code on the server via command injection in the servicestart parameter.