"Software makers can’t catch every bug every time, but Facebook had ample warning about the privacy problems with its “contact import” feature."

"De Ceukelaire and other researchers had already alerted Facebook to similar issues. In 2012, Facebook made changes that resulted in the site's “Download Your Information” tool leaking phone numbers and email addresses that users had not supplied themselves through the contact import feature."

>"Software makers can’t catch every bug every time, but Facebook had ample warning about the privacy problems with its “contact import” feature."

"Facebook had to fix the flaw leaked 500M users'Data"