This is why you don't hire pet sitters from an app! Yikes!
From Fortune dot com:
A popular app that connects dog owners and dog walkers accidentally revealed the lock box codes of at least 50 users, and the home addresses of at least 100.
The information was posted on the website of Wag, an app that connects dog owners with walkers, the Wall Street Journal reports. The Journal said its reporters had viewed the records of more than 100 customers, including 50 lockbox codes, but that new records had appeared at least every day, meaning the total number could potentially be much larger.