The hard bug in MacOS High Sierra

WTF\(^o^)/ﾅﾝﾃｺｯﾀｰ

There's a hard bug in MacOS High Sierra if multiple users are accepted to login.
In above, anyone seems to be able to get a root privilege of the mac without any specific technical skills.

Anyway you'd better to see this page for a detail.
www.wired.com

The person who first discovered this bug had definitely to be freak out, I guess.