Later I spoke with support and they said the cache directory permissions were the only problem identified by their automated system. The directory's permissions are now 755. I looked around a little bit on the server and don't see anything else that is 777. Visiting my board, it also seems to be unaffected.Unfortunately, we found some potential indications that your website(s) *may* be compromised.
The following files/directories had insecure permissions (777), which
have been remediated.
My question is, does this look like anything I should be alarmed about? What are the default permissions for cache/ supposed to be?