Ticket #21217: 21217.2.patch

wp-admin/includes/media.php

@@ -1064 +1064 @@
         $toggle_on  = __( 'Show' );
         $toggle_off = __( 'Hide' );
 
-        $filename = esc_html( basename( $post->guid ) );
+        $filename = esc_html( wp_basename( $post->guid ) );
         $title = esc_attr( $post->post_title );
 
         if ( $_tags = get_the_tags( $attachment_id ) ) {