UPDATE: This issue has been resolved by WordPress. We would recommend updating to the newest version if you are still having issues!
We have recently been made aware of an issue with WordPress 4.7.1 & 4.7.2 where .doc, .docx, .xls and .xlsx files cannot be uploaded to the WordPress admin panel.
Users might encounter the following error: "Sorry, this file type is not permitted for security reasons" when attempting to upload a file to WordPress.
While this is currently being resolved by the WordPress developers, it may be sometime before this fix is actual available.
A work-around for this issue would be to add the following to your wp-config.php file:
/* That's all, stop editing! Happy blogging. */
define( 'ALLOW_UNFILTERED_UPLOADS', true );
We would recommend only using this on a temporary basis as it could lead to potential security issues in the future. You can change this from 'true' to 'false' when not in use.
We will update this page when this issue has been resolved by WordPress.
For further queries relating to this issue, please contact our help desk: