source: https://www.securityfocus.com/bid/14052/info

UBB.Threads is prone to multiple SQL injection vulnerabilities because the application fails 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.

http://www.example.com/ubbt/calendar.php?Cat=7&month=6&year=2005[SQL]
http://www.example.com/ubbt/calendar.php?Cat=&month=7[SQL]&year=2005