Board Thread:General Discussion/@comment-2031854-20130219172633/@comment-3335785-20130219195039

As long as there is some form of attribution, I don't see why not. The main issue with images is their origin. sometimes they're released into the public domain, sometimes they're copyrighted and used on Wikia under fair use.

You'd need to check your website's copyright to make sure you could use images under fair use (it's part of American law so only really applies to servers in America) and then make sure the image is licensed as fair use. If there's no license, I'd steer clear of it unless you can find the source yourself.