Business Insider - Even if a Facebook user sets their friends list to private, other users may still be able to see part of that list. Shay Priel of The CyberInt Group, which focuses on information security and cyber warfare, recently revealed the hack in a blog post. He also reported the hack directly to Facebook. The gist of the issue is that even if you set your personal friends list to be private, that doesn't exclude your friendship from showing up on your friend's newsfeed, on a list of mutual friends, or as Facebook puts it in a reminder in its settings, "If people can see your friendship on another timeline, they'll be able to see it in news feed, search and other places on Facebook." So if you're friends with Sally, and I'm friends with Sally, when you go to my profile, you will see that Sally is a mutual friend, even if my friends list is private. Priel claims that using Facebook Graph Search you can tap into this Mutual Friends list even without being
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