Severe Vulnerability Fixed In UpdraftPlus 1.22.3

	/**
	 * Receive Heartbeat data and respond.
	 *
	 * Processes data received via a Heartbeat request, and returns additional data to pass back to the front end.
	 *
	 * @param array $response - Heartbeat response data to pass back to front end.
	 * @param array $data     - Data received from the front end (unslashed).
	 */
	public function process_status_in_heartbeat($response, $data) {
		if (!is_array($response) || empty($data['updraftplus'])) return $response;
		try {
			$response['updraftplus'] = $this->get_activejobs_list(UpdraftPlus_Manipulation_Functions::wp_unslash($data['updraftplus']));
		} catch (Exception $e) {
			$log_message = 'PHP Fatal Exception error ('.get_class($e).') has occurred during get active job list. Error Message: '.$e->getMessage().' (Code: '.$e->getCode().', line '.$e->getLine().' in '.$e->getFile().')';
			error_log($log_message);
			$response['updraftplus'] = array(
				'fatal_error' => true,
				'fatal_error_message' => $log_message
			);
		// @codingStandardsIgnoreLine
		} catch (Error $e) {
			$log_message = 'PHP Fatal error ('.get_class($e).') has occurred during get active job list. Error Message: '.$e->getMessage().' (Code: '.$e->getCode().', line '.$e->getLine().' in '.$e->getFile().')';
			error_log($log_message);
			$response['updraftplus'] = array(
				'fatal_error' => true,
				'fatal_error_message' => $log_message
			);
		}

		if (UpdraftPlus_Options::user_can_manage() && isset($data['updraftplus']['updraft_credentialtest_nonce'])) {
			if (!wp_verify_nonce($data['updraftplus']['updraft_credentialtest_nonce'], 'updraftplus-credentialtest-nonce')) {
				$response['updraftplus']['updraft_credentialtest_nonce'] = wp_create_nonce('updraftplus-credentialtest-nonce');
			}
		}

		$response['updraftplus']['time_now'] = get_date_from_gmt(gmdate('Y-m-d H:i:s'), 'D, F j, Y H:i');

		return $response;
	}

	/**
	 * Find out if the current request is a backup download request, and proceed with the download if it is
	 */
	public function maybe_download_backup_from_email() {
		global $pagenow;
		if ((!defined('DOING_AJAX') || !DOING_AJAX) && UpdraftPlus_Options::admin_page() === $pagenow && isset($_REQUEST['page']) && 'updraftplus' === $_REQUEST['page'] && isset($_REQUEST['action']) && 'updraft_download_backup' === $_REQUEST['action']) {
			$findexes = empty($_REQUEST['findex']) ? array(0) : $_REQUEST['findex'];
			$timestamp = empty($_REQUEST['timestamp']) ? '' : $_REQUEST['timestamp'];
			$nonce = empty($_REQUEST['nonce']) ? '' : $_REQUEST['nonce'];
			$type = empty($_REQUEST['type']) ? '' : $_REQUEST['type'];
			if (empty($timestamp) || empty($nonce) || empty($type)) wp_die(__('The download link is broken, you may have clicked the link from untrusted source', 'updraftplus'), '', array('back_link' => true));
			$backup_history = UpdraftPlus_Backup_History::get_history();
			if (!isset($backup_history[$timestamp]['nonce']) || $backup_history[$timestamp]['nonce'] !== $nonce) wp_die(__("The download link is broken or the backup file is no longer available", 'updraftplus'), '', array('back_link' => true));
			$this->do_updraft_download_backup($findexes, $type, $timestamp, 2, false, '');
			exit; // we don't need anything else but an exit
		}
	}
}