Passcode can be bypassed now WHAT

I was reading stuff on the internet about a tool that can actually bypass passcodes. even though the device isnt jailbroken it would still work. I was hoping the thief would just factory reset my phone but reading this quite gave me another haunting session

is this true? I'm so scared the thief who stole my iphone will look through my photos and videos which are secrets to me. my icloud still says offline and pending. im gonna have a heart attack PLEASE HELP!!