A researcher has apparently found a way to exploit the new Group FaceTime feature in iOS 12.1 in order to access iPhone users' contact information.

The Hacker News has reported that Spanish researcher Jose Rodriguez made the discovery just hours after the release of version 12.1 last Oct. 31, and subsequently created a video of his technique, which he posted online.

The "hack" works by calling one person's iPhone from another iPhone, then upon connection launching the FaceTime video call option and selecting "Add Person" from the menu. Doing so will reveal to the attacker the other phone's full contact list. Using the 3D Touch option on each contact reveals even more information.

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