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On March 6, 2017, WordPress 4.7.3 was released to the public.

Installation/Update Information

To download WordPress 4.7.3, 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:

• 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

Summary

From the WordPress 4.7.3 release post: WordPress versions 4.7.2 and earlier are affected by six security issues:

1. Cross-site scripting (XSS) via media file metadata. Reported by Chris Andrè Dale, Yorick Koster, and Simon P. Briggs.
2. Control characters can trick redirect URL validation. Reported by Daniel Chatfield.
3. Unintended files can be deleted by administrators using the plugin deletion functionality. Reported by xuliang.
4. Cross-site scripting (XSS) via video URL in YouTube embeds. Reported by Marc Montpas.
5. Cross-site scripting (XSS) via taxonomy term names. Reported by Delta.
6. Cross-site request forgery (CSRF) in Press This leading to excessive use of server resources. Reported by Sipke Mellema.

In addition to the security issues above, WordPress 4.7.3 contains 39 maintenance fixes to the 4.7 release series. For more information, consult the list of changes.

List of Files Revised

wp-admin/js/common.js
wp-admin/js/customize-controls.min.js
wp-admin/js/editor.min.js
wp-admin/js/customize-nav-menus.min.js
wp-admin/js/tags-box.js
wp-admin/js/customize-controls.js
wp-admin/js/editor.js
wp-admin/js/customize-nav-menus.js
wp-admin/js/common.min.js
wp-admin/js/tags-box.min.js
wp-admin/plugins.php
wp-admin/includes/class-wp-press-this.php
wp-admin/includes/media.php
wp-admin/includes/image.php
wp-admin/about.php
wp-includes/embed.php
wp-includes/class-wp-customize-manager.php
wp-includes/rest-api.php
wp-includes/js/media-views.min.js
wp-includes/js/wp-api.js
wp-includes/js/tinymce/plugins/wpeditimage/plugin.min.js
wp-includes/js/tinymce/plugins/wpeditimage/plugin.js
wp-includes/js/tinymce/wp-tinymce.js.gz
wp-includes/js/customize-selective-refresh.min.js
wp-includes/js/media-views.js
wp-includes/js/customize-preview.min.js
wp-includes/js/customize-views.min.js
wp-includes/js/customize-selective-refresh.js
wp-includes/js/wp-api.min.js
wp-includes/js/customize-preview.js
wp-includes/js/customize-views.js
wp-includes/class-wp-image-editor-imagick.php
wp-includes/class-wp-customize-nav-menus.php
wp-includes/version.php
wp-includes/class-walker-page.php
wp-includes/pluggable.php
wp-includes/formatting.php
wp-includes/class-wp-customize-widgets.php
wp-includes/rest-api/class-wp-rest-request.php
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
wp-includes/class-wp-customize-setting.php
wp-includes/theme.php
wp-includes/functions.php
wp-includes/media.php
wp-includes/class-wp-http-requests-hooks.php
wp-includes/class-wp-taxonomy.php
wp-content/plugins