Multiple SQL injection vulnerabilities in Dokeos 1.8.4 allow remote attackers to execute arbitrary SQL commands via the (1) id parameter to whoisonline.php, (2) tracking_list_coaches_column parameter to main/mySpace/index.php, (3) tutor_name parameter to main/create_course/add_course.php, the (4) Referer HTTP header to index.php, and the (5) X-Fowarded-For HTTP header to main/admin/class_list.php.