WordPress at a glance
action is not described

after_password_reset action-hook . WP 4.4.0

Fires after the user's password is reset.

Usage

add_action( 'after_password_reset', 'action_function_name_1385', 10, 2 );
function action_function_name_1385( $user, $new_pass ){
	// action...
}
$user(WP_User)
The user.
$new_pass(string)
New user password.

Where the hook is called

reset_password()
wp-includes/user.php 2330
do_action( 'after_password_reset', $user, $new_pass );

Where the hook is used (in WP core)

wp-includes/default-filters.php 427
add_action( 'after_password_reset', 'wp_password_change_notification' );