https://techcrunch.com/2018/07/09/timehop-discloses-july-4-data-breach-affecting-21-million/

Timehop has disclosed a security breach that has compromised the personal data (names and emails) of 21 million users. Around a fifth of the affected users — or 4.7M — have also had a phone number that was attached to their account breached in the attack.

The startup, whose service plugs into users’ social media accounts to resurface posts and photos they may have forgotten about, says it discovered the attack while it was in progress, at 2:04 US Eastern Time on July 4, and was able to shut it down two hours, 19 minutes later — albeit, not before millions of people’s data had been breached.