Dude, you're a hero.

Others just don't realize it yet because they're going through the stages of grief (Denial, Anger, Bargaining, Depression, Acceptance). https://en.wikipedia.org/wiki/K%C3%BCbler-Ross_model

If no one else says it, I will:

Thank You!

You found a problem, tried to warn them. They didn't listen, so you showed it to them, without harming anything (aside from a few egos). That's doing the right thing.

No, a douche would have sold this exploit to an underground group. You just drew attention by show-hacking a big player, preventing other people finding the exploit while this goes unwatched - that's honorable in my opinion.

You're good by me. There are so many ways that you could've gone in a truly evil direction with this exploit, and you chose not to.

You did it under your own full name. For me that's enough to consider your intentions to be good, even though it might've been smarter to try a bit harder to bring attention to the issue in other ways first.

+1 for a hero. Чувак. Ты крут.

Egor, keep up with the good work. Not your fault Rails guys are overly self-confident.