Ticket #41224: 41224.patch

src/wp-includes/class-wp.php

@@ -270 +270 @@
                         }
 
                         // If req_uri is empty or if it is a request for ourself, unset error.
-                        if ( empty($requested_path) || $requested_file == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false ) {
+                        if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
                                 unset( $error, $_GET['error'] );
 
-                                if ( isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false )
+                                // If isset perma_query_vars and found url "wp-admin/" from the administrative interface page.
+                                if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false && is_admin() )
                                         unset( $perma_query_vars );
 
                                 $this->did_permalink = false;