The point of the 0-day black market is to not reveal these attacks publicly. If there were public proof of this in the past it would have been fixed in the past.

Take my word for it when I say there are upper echelons of black hats that are stockpiling unknown 0-day exploits like this and presently using them in the wild.

Or dismiss me as irrational and continue with the belief that all bugs are unknown until white hats share them with Apple.