Earlier this week, security researcher Khalil Shreateh discovered a Facebook bug that allowed a hacker to post on anyone's wall — even if they weren't that person's friend.
While he was able to prove to Facebook that his bug was legit (despite an initial response that it wasn't a bug at all), Facebook wasn't too happy with the way he did it: by using the bug to post on Zuckerberg's otherwise friends-only wall.
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