https://medium.com/swlh/exploiting-php-deserialization-56d71f03282a
https://www.exploit-db.com/exploits/49933
POC https://github.com/flast101/php-8.1.0-dev-backdoor-rce
https://github.com/flast101/php-8.1.0-dev-backdoor-rce/blob/main/revshell_php_8.1.0-dev.py