Multiple SQL injection vulnerabilities in Moodle 1.8.x before 1.8.12 and 1.9.x before 1.9.8 allow remote attackers to execute arbitrary SQL commands via vectors related to (1) the add_to_log function in mod/wiki/view.php in the wiki module, or (2) "data validation in some forms elements" related to lib/form/selectgroups.php.