An anonymous reader writes "Include Security unveiled new research showing that users of the popular online dating app Tinder were at significant risk due to a vulnerability they discovered in the geo-location feature of the application. This vulnerability allowed Tinder users to track each another's exact location for much of 2013. Anyone with rudimentary programming skills could query the Tinder API directly and pull down the co-ordinates of any user. This resulted in a privacy violation for the users of the application." Include Security has posted a video that shows how the the flaw could be exploited, before it was fixed last month.