If you have a self-hosted WordPress installation, you need to be aware of directory browsing and the implications of allowing it. WordPress tries to prevent directory browsing, even if you (knowingly or unknowingly) have it enabled. Unfortunately, it is up to you to make sure your site is completely secure.
When you migrate a site from one domain to another, it is very important that you don’t break all the links that you built to your old domain. Proper redirection of all the pages on the old domain to the same location on the new domain will ensure that visitors to the old domain will end up in the right place. A failure to redirect will result in a loss of visitors as well as search engine rankings.