Version 4.3.15

On 16 January, 2018, WordPress 4.3.15 was released to the public.

Installation/Update Information

To download WordPress 4.3.15, update automatically from the Dashboard > Updates menu in your site’s admin area or visit

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 4.9.2 release post: WordPress versions 4.9 and earlier are affected by an XSS vulnerability in the Flash fallback files in MediaElement 4.x. The following fixes have been implemented in this release:

  1. Upgrade: When deleting old files, if deletion fails attempt to empty the file instead. (#42963)
  2. External Libraries: Remove unnecessary / obsoleted MediaElement.js files. (#42720)

List of Files Revised


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