<p>This is, when you use cool stuff like <span class="caps">AJAX</span>, that empowers your website, you should take into consideration all the problems that it might cause, specially cross-site scripting.</p>

<p>I&#8217;ve been subscribing an interesting blog on security, <a href="http://www.gnucitizen.org/">GNUCitizen</a>. I really enjoyed the <a href="http://www.gnucitizen.org/projects/the-pownce-worm/">Pownce Exploit</a> they did, and shows that you might not be secure in all those websites you visit.</p>

<p>Oh, and you should really take a look at their <a href="http://www.gnucitizen.org/projects/30mins-introductionary-presentation-on-client-side-security/">introductory presentation on client side security</a>.</p>