source: https://www.securityfocus.com/bid/14851/info
   
DeluxeBB is prone to multiple SQL injection vulnerabilities. These are due to a lack of proper sanitization of user-supplied input before being sent to SQL queries.
   
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/pm.php?sub=newpm&uid=[code]