source: https://www.securityfocus.com/bid/14762/info

MyBulletinBoard is prone to multiple SQL injection vulnerabilities. These issues are due to a lack of proper sanitization of 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. 

misc.php :-

http://www.example.com/misc.php?action=rules&fid=-1' [SQL]

newreply.php :-

One may inject SQL data by submitting a HTTP POST with a modification
of the http header as follows:

Content-Disposition: form-data; name="icon"\r\n
\r\n
-1') [SQL] /*\r\n