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Why You Shouldn’t Share Links via Facebook Messenger

In a post on Medium, security researcher Inti De Ceukelaire explains how any developer could see the URLs you share in private Facebook messages. Even if you’re only linking to cat pictures, URLs sometimes contain sensitive information that you’re unaware of, such as names, locations, and even hidden keys. When De Ceukelaire reached out to Facebook, the company said that this was “publicly documented and intentional behavior.” Long story short: be cautious about using Facebook Messenger, particularly for any sensitive communications!

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