Students hacked into Bloomfield Hills High School by exploiting a vulnerability in the system to manipulate grades, attendance and lunch balance information. Bloomfield believes that the unauthorized changes made within MISTAR impact more than 20 high school students record in some way. As a precaution measure, the school resets all Parent Portal passwords on Friday and mailed to all parents detailing the incident and how to change their password upon returning to the system. Superintendent Robert Glass said hes embarrassed that students from our school districts thought to use their technology skills and their talents to selfishly manipulate grades.”]