source: https://www.securityfocus.com/bid/14034/info
 
DUpaypal Pro is prone to multiple SQL-injection vulnerabilities because the fails application to properly sanitize user-supplied input before using it in SQL queries.
 
A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database implementation. 

http://www.example.com/DUpaypalPro/shops/sub.asp?iSub=[SQL Inject]