...but surely it would have been better to email privately about this serious flaw, rather than posting it for the world to see ?
That was my approach. On the other hand, it was the the first file I opened to check for future modding projects so I guess many modders are already aware of the problem and probably a good bunch of the active beta testers and players too.
Computer Security 101: Shit gets fixed faster if you make it public.
True but I was assured by a GPG employee that this is one of their top priorities and they will fix it as soon as possible. And I doubt the would delay fixing this for any reason.