source: https://www.securityfocus.com/bid/17617/info

Plexum is prone to multiple SQL-injection vulnerabilities. These issues are due to a failure in the 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.

Version X5 is vulnerable; other versions may also be affected.

http://www.example.com/plexum.php?section=webstats&page=hits&startpos=15&maxrec=457&pagesize=[SQL]

http://www.example.com/plexum.php?section=webstats&page=hits&startpos=450&maxrec=[SQL]

http://www.example.com/plexum.php?section=webstats&page=hits&startpos=[SQL]