Multiple cross-site scripting (XSS) vulnerabilities in ATutor 1.6.4 allow remote authenticated users, with Instructor privileges, to inject arbitrary web script or HTML via the (1) Question and (2) Choice fields in tools/polls/add.php, the (3) Type and (4) Title fields in tools/groups/create_manual.php, and the (5) Title field in assignments/add_assignment.php.  NOTE: some of these details are obtained from third party information.