To offer one alternative explanation. It could be that the victim had some app on their phone which was logging SMS. The exploit may have involved sending the S

To offer one alternative explanation. It could be that the victim had some app on their phone which was logging SMS. The exploit may have involved sending the SMS code to the phone and forwarding it to the attacker. It's possible there was no exploit on Uber's side at all. We don't have enough information to know one way or the other.