This morning I had a update message about WordPress 3.9.2 by an email. It is a minor maintenance release. But it includes a fix for ‘a possible denial of service issue in PHP’s XML processing’ and others. They strongly encourage us to update our sites immediately. So if your site does not support automatic background updates, you’d better follow their words and update manually.
List of Files Revised
readme.html
wp-admin/about.php
wp-includes/ID3/getid3.lib.php
wp-includes/class-IXR.php
wp-includes/class-wp-customize-widgets.php
wp-includes/compat.php
wp-includes/pluggable.php
wp-includes/version.php
wp-login.php