<p>One well known and dangerous WordPress security vulnerability is User Enumeration, in which a
                            malicious user is able to enumerate a valid WordPress user account to launch a brute force attack against it.
                            In order to help deter this type of attack, it is important not to have the default <a href="http://www.acunetix.com/blog/web-security-zone/articles/default-wordpress-administrator-account/" target="_blank">WordPress administrator</a>
                            username enabled on your blog.</p>