Ticket #47482: 47482.diff

wp-includes/feed.php

@@ -587 +587 @@
 function atom_site_icon() {
         $url = get_site_icon_url( 32 );
         if ( $url ) {
+                $url = esc_url( $url );
                 echo "<icon>$url</icon>\n";
         }
 }