[sixhobbits]

Maybe tell someone like Troy Hunt from haveibeenpawned. He has a pretty good reputation/following for verifying this kind of thing and telling the right people.

[ajdude]

I came into here to offer the same advice, that's exactly what their specialty is.

[g48ywsJk6w48]

Unfortunately, he did not answer for a week. Started thinking data leak is not a super interesting topic for professionals. It happened every week, so my discovery is just another data leak.

[vincent_s]

Or use one of the organizations that have a secure drop instance running [0]

[0] https://securedrop.org/directory/

[j3th9n]

Telling divd.nl (Dutch Institute for Vulnerability Disclosure) can be a good option too.