Description

This vulnerability occur because there is no filename restriction for saving logging file. In this case attacker can set the filename to existing php file and append php code on it by manipulating the logged input.

Proof of Concept

1. Log in using operator account, in this case i try to login using operator1 user which is account that i created with ACL Settings only rep_online enabled
2. Go to config and click on logging settings. Modify filename to any php file that accessible , e.g update.php then enabled Logging of Queries Here i use update.php
3. Go to rep_online feature and fill the username with php code, e.g phpinfo()
4. Go to update.php and you will see that phpinfo() successfully injected

Impact

Attacker can gain RCE on server and then takeover the server (read, modify, add, and delete file)