An information disclosure bug has drawn back the curtain on some of the data correlation Facebook does with users contact details and opened the social network s policies up to criticism. Facebook said the bug in its Download Your Information (DYI) tool has been repaired but not before six million users had their email addresses and phone numbers inadvertently shared with others. A researcher reported the bug to security site Packet Storm who shared details with Facebook last week. Facebook shut the DYI service down for a day for repairs before turning it back on.
Source: https://threatpost.com/bug-exposes-facebook-data-correlation-privacy-issues/101066/