source: https://www.securityfocus.com/bid/14833/info

Noah's Classifieds is prone to an SQL injection vulnerability. This is 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. 

http://www.example.com/classifieds/index.php?methode=showdetails&list=Advertisment&rollid=4'