Simple Document Management System 2.0 - 'messages.php?mid' SQL Injection

source: https://www.securityfocus.com/bid/15596/info
 
Simple Document Management System (SDMS) is prone to 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. 

/messages.php?forum=1&action=view&mid=[SQL]