KSES: Add selected ARIA attributes support.

Allow low-privileged users to use the ARIA attributes `aria-describedby`, `aria-details`, `aria-label`, `aria-labelledby` and `aria-hidden`.

Merges [43731] to trunk.

Props mattheu, swissspidy, rianrietveld, afercia, GaryJ.
See #30421.


git-svn-id: https://develop.svn.wordpress.org/trunk@43984 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/kses.php

@@ -2119,12 +2119,17 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
  */
 function _wp_add_global_attributes( $value ) {
 	$global_attributes = array(
-		'class'  => true,
-		'id'     => true,
-		'style'  => true,
-		'title'  => true,
-		'role'   => true,
-		'data-*' => true,
+		'aria-describedby' => true,
+		'aria-details'     => true,
+		'aria-label'       => true,
+		'aria-labelledby'  => true,
+		'aria-hidden'      => true,
+		'class'            => true,
+		'id'               => true,
+		'style'            => true,
+		'title'            => true,
+		'role'             => true,
+		'data-*'           => true,
 	);
 
 	if ( true === $value ) {