XSS

Dear all,

I click this link by mistake,

What does this link do? It didn't opened a page or and alert
Does it harmful?

http://www.phpnuke.org/user.php?op=userinfo&uname=<script>alert(document.cookie);</script>
LVL 1
BRMarketingAsked:
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mosidiotConnect With a Mentor Commented:
Nope... Not at all..

First of all, phpnuke is a official clean domain for php addon portal download and stuff, it wouldn't contain anything harmful..

Secondly, <script>alert(document.cookie);</script> doesn't do any harm and even it contain malicious script e.g. the cookie content is something like:
);</script><script>do something bad here;alert("again"

at most the whole thing will look like:

<script>alert();</script><script>do something bad here;alert("again");</script>

But don't forget cookie are only allowed to store a maximum of 3kb of data, that include it's own preset data and etc. I don't believe how harmful can a hundred line of code can do to your computer...

As long as it doesn't prompt you to download and open any file, you should be quite safe...
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