function execute_backup($command) {
	$backup_options = get_option('dbmanager_options');
	check_backup_files();

	if( realpath( $backup_options['path'] ) === false ) {
		return sprintf( __( '%s is not a valid backup path', 'wp-dbmanager' ), stripslashes( $backup_options['path'] ) );
	} else if( dbmanager_is_valid_path( $backup_options['mysqldumppath'] ) === 0 ) {
		return sprintf( __( '%s is not a valid mysqldump path', 'wp-dbmanager' ), stripslashes( $backup_options['mysqldumppath'] ) );
	} else if( dbmanager_is_valid_path( $backup_options['mysqlpath'] ) === 0 ) {
		return sprintf( __( '%s is not a valid mysql path', 'wp-dbmanager' ), stripslashes( $backup_options['mysqlpath'] ) );
	}

	if( substr( PHP_OS, 0, 3 ) === 'WIN' ) {
		$writable_dir = $backup_options['path'];
		$tmpnam = $writable_dir.'/wp-dbmanager.bat';
		$fp = fopen( $tmpnam, 'w' );
		fwrite ($fp, $command );
		fclose( $fp );
		system( $tmpnam.' > NUL', $error );
		unlink( $tmpnam );
	} else {
		passthru( $command, $error );
	}
	return $error;
}
The product receives input or data, but it does
        not validate or incorrectly validates that the input has the
        properties that are required to process the data safely and
        correctly.