If we believe what researchers said at Black Hat USA conference held in Las Vegas then websites deploying Ajax definitely need to fear about web based threats. Ajax imparts richness to the website and at the same time refreshes the content without the need for reloading the whole page. Poorly coded websites can give a chance to hackers to change the order in which the function is executed by the program. JavaScript leads to increased possibility of attracting the attention of hackers and chances of mistakes in an Ajax application are more as compared to traditional web applications since the client plays a larger part in data processing, presentation and possibly storage.

The need of the hour is to pay attention to the basic Ajax security issues since it's new and the chances of its exploitation are quite high as it is catching up with developers thereby increasing the chances of catching the eyes of hackers.