    public function validate($aIP, $config, $context) {

        if (!$this->ip4) $this->_loadRegex();

        if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
        {
                return $aIP;
        }

        return false;

    }
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.