While social media sites such as Facebook and Twitter make it easy to share things with your friends, they also make it easy to log in to various services and applications, too. As authentication brokers, Facebook and Twitter let users use their account credentials to sign into third-party sites. To do so, the user has to give permission for those sites to access their profile data.
Facebook is a full-blown apps ecosystem. You may have added an app to take advantage of a promotion or contest, played a game, or added new functionality such as music streaming. In most cases, it just means the app developer has access to some of your profile data. In the worst-case scenario, a malicious developer behind the service can use your account to send out spam.
Continue Reading… What Apps Have Access to Your Facebook and Twitter?