He could have ask a friend to apply the exploit, is a matter of responsibility because you need proofs to support your statements. What would happen if the exploit is not real and he called it out incorrectly?
The author stated that a proof of concept was released. This is a verifiably true fact. Nowhere was it claimed it worked, and in fact that's quite clear by the "unconfirmed" in the title and the "[w]e have not confirmed if this exploit works" in the first paragraph.
Wasn't supposed to be agressive, just wanted to make sure It's clear I completely disagree with you. Sorry if that came off as agressive, that certainly wasn't the intention.