Multiple PHP remote file inclusion vulnerabilities in the ExtCalThai (com_extcalendar) 0.9.1 and earlier component for Mambo allow remote attackers to execute arbitrary PHP code via a URL in (1) the CONFIG_EXT[LANGUAGES_DIR] parameter to admin_events.php, (2) the mosConfig_absolute_path parameter to extcalendar.php, or (3) the CONFIG_EXT[LIB_DIR] parameter to lib/mail.inc.php.