iOS 13 user Jose Rodriguez discovered a vulnerability in the system that allows access to contacts bypassing the lock screen. Apple fixed it in iOS 13.1, but left GM in iOS 13.
Last year, Rodriguez discovered a similar error in iOS 12.
Example of an exploit in iOS 13:
iOS 13 exploit bypasses the lockscreen for access to contacts Security flaw should be fixed in iOS 13.1 www.theverge.com