That previous attack only affects yourself but we will look at one that could affect others. You might also be asking what is the point in the alert - is it really going to bother people? In practice, attacks by someone malicious will involve more than alert('XSS') but it is a nice visible way to test and if you can execute an alert attack then you have found a major bug in the site.
So for the next challenge with XSS you will need to make the same attack, however to add a bit of extra challenge you won't be able to enter text into the input box. See if you can figure it out. If you are stuck, try entering a value if 10 for a hint.
<script>alert('XSS')</script>
Your Rating: no value submitted
Once you enter the XSS attack <script>alert('XSS')</script>, a link to the next challenge will appear here