Canvas was down on May 7 because of a hacking incident. These Pittsburgh colleges and universities use the online learning platform.

Canvas, a cloud-based learning management platform used by thousands of schools and universities, is back up after it was disabled for hours May 7.

Canvas is back online after a hack that impacted more than 8,000 schools and colleges across the country. (AP photo)

On Thursday, a hacker group called "ShinyHunters" said it was responsible for a data breach of Instructure, which manages the Canvas system for several schools across the country. The group said it would release data it acquired through the breach unless it was paid a ransom.

Students attempting to access grades, study materials and quizzes were met instead with a message from a hacking group on Thursday.

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