A cyberattack on Canvas could not have come at a worse time. The learning platform, used by schools and universities for assignments, exams, grades, lecture materials, and class communication, went down during finals week, leaving students and instructors scrambling for alternatives. The incident has been linked to ShinyHunters, a hacking group known for data theft and extortion. According to BleepingComputer , Canvas login portals at hundreds of institutions were defaced with a ransom-style message warning that stolen student data would be leaked unless the attackers were contacted. The group claimed to have obtained data tied to millions of students, teachers, and staff across thousands of schools. What went wrong inside Canvas? Instructure, the company behind Canvas, said hackers exploited an issue related to its Free-for-Teacher accounts, forcing it to temporarily shut down the platform to investigate the matter.…