Ticket #46723: 46723.patch

src/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php

@@ -58 +58 @@
          * @return true|WP_Error True if the request has read access for the item, otherwise WP_Error object.
          */
         public function get_items_permissions_check( $request ) {
-                if ( ! is_user_logged_in() || ! current_user_can( 'edit_posts' ) ) {
+                if ( ! is_user_logged_in() || ! ( current_user_can( 'edit_posts' ) || current_user_can( 'upload_files' ) ) ) {
                         return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to view themes.' ), array( 'status' => rest_authorization_required_code() ) );
                 }