    public function clearTags() {
        $this->_tags = array(); // clear tag cache

        return (bool) CActiveRecord::model('Tags')->deleteAllByAttributes(array(
            'type' => get_class($this->getOwner()),
            'itemId' => $this->getOwner()->id)
        );
    }
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.