'0.0.0.0' means 'all local host addresses'. Including whatever might be listening on 127.0.0.0/8.
It's just a private network address, and this "vulnerability" is because idiots adhere to the letter of the spec maliciously instead of understanding current practice.
Wait, so you're suggesting developers shouldn't adhere to specs but instead develop their tools / libraries according to whatever they feel it is the cool kids currently do?
It's just a private network address, and this "vulnerability" is because idiots adhere to the letter of the spec maliciously instead of understanding current practice.