Multiple cross-site scripting (XSS) vulnerabilities in Uncanny Groups for LearnDash before v3.7 allow authenticated remote attackers to inject arbitrary JavaScript or HTML via the ulgm_code_redeem POST Parameter in user-code-redemption.php, the ulgm_user_first POST Parameter in user-registration-form.php, the ulgm_user_last POST Parameter in user-registration-form.php, the ulgm_user_email POST Parameter in user-registration-form.php, the ulgm_code_registration POST Parameter in user-registration-form.php, the ulgm_terms_conditions POST Parameter in user-registration-form.php, the _ulgm_total_seats POST Parameter in frontend-uo_groups_buy_courses.php, the uncanny_group_signup_user_first POST Parameter in group-registration-form.php, the uncanny_group_signup_user_last POST Parameter in group-registration-form.php, the uncanny_group_signup_user_login POST Parameter in group-registration-form.php, the uncanny_group_signup_user_email POST Parameter in group-registration-form.php, the success-invited GET Parameter in frontend-uo_groups.php, the bulk-errors GET Parameter in frontend-uo_groups.php, or the message GET Parameter in frontend-uo_groups.php.