MySpace, Facebook and Twitter attacks

At the beginning of the decade, security experts at businesses had to struggle with employees' use of instant messaging from AOL, Webmail from Yahoo, and peer-to-peer networks. These applications poked holes in corporate firewalls, opening various ports that created new vectors for malware.

The battle initally focused on server port 80; but by the end of the decade, the top concerns were Facebook, Twitter, and other Web 2.0 applications.

In 2005, a teenager authored the Samy worm on MySpace, which highlighted a central problem of Web 2.0--that user-contributed content could contain malware. Even as Facebook endured a few privacy snafus, it also had its own worm, called Koobface.

In 2009, Twitter came of age, too, attracting its own malware and highlighting the dangers of shortened URLs - with them, you can't see what's waiting on the other side. Twitter also suffered from spam ... or did Guy Kawasaki really send you that porn link?

Source here.....