Ticket #34405: 34405.patch

src/wp-includes/post-functions.php

@@ -1942 +1942 @@
                         else
                                 $value = format_to_edit($value);
                 } else {
-                        $value = esc_attr($value);
+                        if ( is_array( $value ) ) {
+                                $value = array_map( 'esc_attr', $value );
+                        } else {
+                                $value = esc_attr( $value );
+                        }
                 }
         } elseif ( 'db' == $context ) {
                 if ( $prefixed ) {