    public function getChild($type, $id) {
        if (!isset($this->children[$type][$id])) {
            $this->children[$type][$id] = new HTMLPurifier_ErrorStruct();
            $this->children[$type][$id]->type = $type;
        }
        return $this->children[$type][$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.