In May 2015, the "monitoring" software known as mSpy suffered a major data breach. The software (allegedly often used to spy on unsuspecting victims), stored extensive personal information within their online service which after being breached, was made freely available on the internet.
Accounts breached: 699793
Breached on: May 14, 2015
Exposed data: Device usage tracking data
Added on: May 28, 2015