On 7 Sept, 2016, WordPress 4.5.4 was released to the public.
To download WordPress 4.5.4, 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:
- New To WordPress – Where to Start
- First Steps With WordPress or Upgrading WordPress Extended
- WordPress Lessons
From the WordPress 4.6.1 release post: WordPress versions 4.6 and earlier are affected by two security issues: a cross-site scripting vulnerability via image filename, reported by SumOfPwn researcher Cengiz Han Sahin; and a path traversal vulnerability in the upgrade package uploader, reported by Dominik Schilling from the WordPress security team.
List of Files Revised
wp-admin/about.php wp-admin/includes/class-wp-upgrader.php wp-admin/includes/media.php wp-includes/version.php readme.html