On 11 Jan, 2017, WordPress 4.5.5 was released to the public.
To download WordPress 4.5.5, update automatically from the Dashboard > Updates menu in your site's admin area or visit https://wordpress.org/download/release-archive/.
For step-by-step instructions on installing and updating WordPress:
If you are new to WordPress, we recommend that you begin with the following:
From the WordPress 4.7.1 release post: WordPress versions 4.7 and earlier are affected by seven security issues:
update-core.php. Reported by Dominik Schilling of the WordPress Security Team.
mail.example.comif default settings aren’t changed. Reported by John Blackbourn of the WordPress Security Team.
wp-includes/class-wp-theme.php wp-includes/functions.php wp-includes/ms-functions.php wp-includes/class-smtp.php wp-includes/class-phpmailer.php wp-includes/version.php wp-mail.php readme.html license.txt wp-admin/widgets.php wp-admin/update-core.php wp-admin/includes/media.php wp-admin/includes/class-wp-screen.php wp-admin/about.php