[incarnate]

This is exactly the same thing that let someone delete Mat Honan's (Wired author) accounts back in 2012:

Apple tech support gave the hackers access to my iCloud account. Amazon tech support gave them the ability to see a piece of information — a partial credit card number — that Apple used to release information.

http://www.wired.com/2012/08/apple-amazon-mat-honan-hacking/

[ec109685]

No, customer service did not disclose the cc number in this instance -- they did disclose his address though, which stinks.