I PM'ed the admins long ago about this but there has been no action lately even after the upgrade so id like to speak on this publicly that there are subforums whose group permissions are set to exploitable ways. Guests or unregistered users can post or create topics in some subforums lile the one I just did right now: https://www.istorya.net/forums/video-...8922-test.html
This existed since that forum got changed but nobody seems to notice.