Foursquare Privacy Hole Exposed By Hacker

Foursquare Privacy Hole Exposed By Hacker

If you have checked in with Foursquare in San Francisco in the last three weeks, Jesper Andersen probably knows where and when -- even if you've set your check-ins to be published to friends only.

Andersen, a coder who recently built a service called Avoidr that helps you avoid social network "friends" you don't really like, figured out that Foursquare had a privacy leak because of how it published user check-ins on web pages for each location.

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