In November 2010, a group of social-networking sites users who are using Facebook and other sites like Orkut, etc. have in mind that some social activities must be done outside of their computer room.
Some of the most popular social classified applications and sites include Orkut, Facebook Marketplace, 50List and Oodle which has a social classified application on MySpace.
Cross-site scripting vulnerabilities are commonly exploited in the form of worms on popular social or commercial websites, such as MySpace, Yahoo!, Orkut, Justin.tv, Facebook and Twitter.