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This story is part of When Spies Come Home, a Motherboard series about powerful surveillance software ordinary people use to spy on their loved ones.

A website and app designed to let users monitor their children, employees, or illegally spy on their spouse inadvertently allowed anyone who was using the service to obtain information contained within other peoples’ accounts and intercept the communications of around 28,000 users, Motherboard has confirmed following a tip from a hacker.

The app, called Xnore, can be installed on Android, iPhone, and BlackBerry devices, and collects Facebook

This post first appeared on motherboard security news. Read the full article.