Multiple SQL injection vulnerabilities in GLPI before 0.83.9 allow remote attackers to execute arbitrary SQL commands via the (1) usersidassign parameter to ajax/ticketassigninformation.php, (2) filename parameter to front/document.form.php, or (3) table parameter to ajax/comments.php.
inc/ticket.class.php in GLPI 0.83.9 and earlier allows remote attackers to unserialize arbitrary PHP objects via the predefinedfields parameter to front/ticket.form.php.