This is as bad as it gets. While Apple’s hardware is still top-notch, the quality of their software – especially on macOS – seems to be going down. Too much emphasis on iOS?
Wow, this is a bad one. On Macs running the latest version of High Sierra (10.13.1 (17B48)), it appears that anyone can log in just by putting “root” in the..
Source: Huge security flaw lets anyone log into a High Sierra Mac
Updates:
2017-11-30: Apple releases a fix
2017-11-30: The fix apparently broke file sharing on macOS. Software is hard. Period.