Have you ever signed up for a Page using your Facebook credentials?, Twitter or others? If so, the security of your accounts may have been compromised.
Researchers at the Chinese University of Hong Kong have found that most mobile apps use the registration and authentication system OAuth 2.0 are insecure.
OAuth 2.0 is an open standard used for user registration without having to use usernames or passwords, simply by logging in with your Facebook account, Twitter or Google+.
Due to poor programming by application developers, hackers could take advantage of a system weakness to impersonate legitimate users to gain access to accounts, with full access to the information they house. For example, if you use an app to book your vacation, the cybercriminal could have access to your bank details, as well as the itinerary you are going to follow and other private information.
Researchers have analyzed hundreds of the most famous applications and have specified that 2.4 one billion devices are at risk worldwide, of which it is estimated that about one billion people will use this login system.