If there is not a WordPress plugin that will do the trick I think it would be fairly simple to make one to do this using the Flickr API Flickr Services: Flickr API: flickr.favorites.getList.
I favorite any @creativecommons image I use from @flickr and used to have a stream of my faves on my “Image Attribution” page. Seeing that it was a flash player my favorite stream isn’t working. Anyone have an idea of how I could add it bacK? #IndieWeb