I have the same problem. My Avast online security says that wix is infected with a "HTML:Script-inf" Trojan.
I visit my own site all the time, but today when I tried visiting my own site, my Avast online security system blocked access (see screenshot attached); I tried going in to edit my site, and I was able to log in, but it blocks the editor, too. I tried going to another wix site and it blocked that as well. This has never happened with my own site before. I'm not sure what to do; I just want to be sure that wix is safe to use. Is there a way to get rid of the "malicious code?" I was able to submit a ticket to weeks, so I'll see if I get an answer.