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

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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


git-svn-id: https://develop.svn.wordpress.org/trunk@42830 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
John Blackbourn 2018-03-12 10:56:53 +00:00
parent 36d237cc13
commit a4f6e8dadb
1 changed files with 5 additions and 3 deletions
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8
src/wp-admin/includes/misc.php
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@ -1146,15 +1146,17 @@ function wp_admin_canonical_url() {
* @since 4.9.0
*/
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 );