Multiple cross-site scripting (XSS) vulnerabilities in the registration page in phpScheduleIt 1.0.0 RC1 allow remote attackers to inject arbitrary web script or HTML via the (1) Name or (2) Lastname fields during new user registration, or (3) the Schedule Name field.

phpScheduleIt 1.0.0 RC1 does not clear administrative privileges if the administrator logs in as a normal user, which allows users with physical access to gain administrative privileges.

Unspecified vulnerability in Reservation.class.php for phpScheduleIt 1.01 and earlier allows attackers to modify or delete reservations.