Ticket #9559: bug9559.omit-passworded-posts-from-search.diff

wp-includes/query.php

@@ -1759 +1759 @@
                         if (empty($q['sentence']) && count($q['search_terms']) > 1 && $q['search_terms'][0] != $q['s'] )
                                 $search .= " OR ($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}')";
 
-                        if ( !empty($search) )
+                        if ( !empty($search) ) {
                                 $search = " AND ({$search}) ";
+                                if ( !$this->is_admin )
+                                        $search .= " AND ($wpdb->posts.post_password = '') ";
+                        }
                 }
 
                 // Category stuff