"Note: This solution might be specific to High Sierra"

"Solution 2 worked for me. No idea how or why. Hope this helps."

User seems to have known about it at least 2 weeks ago. Wonder if they realized that it's a glaring security issue. It's hard to tell from the comment if this something they found themselves or saw or heard about it from someone else.

It would be interesting to search other forums, maybe in different languages to see how long has this been known.