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Instagram was basically invented for the humble brag. Oh, this old outfit? Why yes, I did bake this cake from scratch. And of course, there's the passport-avec-boarding pass tease to an upcoming adventure (even HGTV star Jillian Harris can't resist!). But this seemingly innocent social media share could have serious repercussions.

According to KrebsonSecurity, websites exist that can read the barcode on your boarding pass and then hack your personal information — including your phone number, frequent flyer number, and info about all future flights you book through the same number. That means they can then change your seat on your flight, cancel future flights, and even reset your account PIN entirely. Yikes.

So the next time you're jetting off to somewhere fabulous, just mention your destination in the caption. We're sure your followers will believe you — even without photo proof.

[via Smart Travel

Lauren Smith McDonough Senior Editor Lauren is a senior editor at Hearst.

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