A beer and pub-rating app built off the back of Foursquare’s location-tracking API poses a risk to the security of military and intelligence personnel, according to legendary OSINT website Bellingcat. Untappd ‘has over eight million mostly European and North American users, and its features allow researchers to uncover sensitive information about said users at military and intelligence locations around the world,’ wrote Bellingcat’s Foeke Postma in a fascinating guide to using the app for tracking down people of interest.

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