Cross-site scripting CAN be used to hack a server
...Hacker Safe said XSS wasn't important because "cross-site scripting can't be used to hack a server. You may be able to do other things with it. You may be able to do things that affect the end-user or the client. But the customer data protected with the server, in the database, isn't going to be compromised by a cross-site scripting attack,...
