Changeset 42831

Timestamp:

03/12/2018 10:58:24 AM (7 years ago)

Author:

johnbillion

Message:

Security: Loosen the admin referrer policy header value to allow the referring host to be sent from the admin area in all cases.

This allows referrer-restricted content from third parties (such as images and fonts) to continue working in the admin area.

Props aranwer104, qcmiao

Fixes #43285

Merges [42830] to the 4.9 branch.

Location:

branches/4.9

Files:

• . (modified) (1 prop)
• src/wp-admin/includes/misc.php (modified) (1 diff)

branches/4.9/src/wp-admin/includes/misc.php

@@ -1100 +1100 @@
  */
 function wp_admin_headers() {
-    $policy = 'same-origin';
+    $policy = 'strict-origin-when-cross-origin';
 
     /**
-     * Filters the admin referrer policy header value. Default 'same-origin'.
+     * Filters the admin referrer policy header value.
      *
      * @since 4.9.0
+     * @since 4.9.5 The default value was changed to 'strict-origin-when-cross-origin'.
+     *
      * @link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
      *
-     * @param string $policy The referrer policy header value.
+     * @param string $policy The admin referrer policy header value. Default 'strict-origin-when-cross-origin'.
      */
     $policy = apply_filters( 'admin_referrer_policy', $policy );