Thanks, @Marc Stridgen There isn't any guest posting anywhere, there never has been, which is why I was so concerned. It did move forum, because I moved it to a moderating forum, and then moved it back for you to check.
I did slightly doubt that it was the board, as you guys would know about it way before, and obviously, others would be saying the same thing.
I would agree and suspect it may be a third-party app, but without the marketplace hooked up in admin now and no notifications of updates, I wouldn't know where it could be from. Plus all devs are spread on sites around the internet now, which makes it so much harder when things like this occur and looking for updates.
Thanks for looking into it anyway.