Basically GM injected items. There existed an MD+8 with dex bonus back in Beramus and everybody knows the infamous Mirage+8 with poison. Normally they're trying to make it less obvious though.
Edit: The problem is though, that the existance of those items can't be verified without more proof, like database access or verified screenshots. It's pretty easy to fake items, although I don't know why people would do it now. A lot of people did it in the past just to make bad youtube videos and start rumors.
Bookmarks