    private function _pLookAhead() {
        $this->current($i, $current);
        if ($current instanceof HTMLPurifier_Token_Start) $nesting = 1;
        else $nesting = 0;
        $ok = false;
        while ($this->forwardUntilEndToken($i, $current, $nesting)) {
            $result = $this->_checkNeedsP($current);
            if ($result !== null) {
                $ok = $result;
                break;
            }
        }
        return $ok;
    }
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.