Facebook's security flaws exposed more than Facebook — here's what (little) you can do

The security issue Facebook announced on Friday has alarmed researchers who say attackers collected information that not only gave access to sensitive information on Facebook, but also could be used to access many websites that use the social network’s ‘Login with Facebook’ function. … Damon McCoy, assistant professor of computer science and engineering at New York University [Tandon School of Engineering] … advised that users check their “Security and Login” settings in Facebook. … McCoy said in an email that attackers could have made any number of changes to compromised accounts. “Some examples of how a Facebook account might have been misused include adding/deleting friends, post, Facebook apps, comments, likes, private messages,” McCoy said.