It's hard to say Sasha, I suppose there could be a couple of factors. Could it be someone who's been removed from that forum is still able to see it or that someone who has known access is sharing info outside of it? I know that I have had issues removing people, it's easy to miss a step (for me anyway

) If someone is not part of that group then access is very unlikely as it's quite secure and there isn't any known vulnerabilities.