I recently had a high school assignment document get posted on a bunch of sites that sell homework help. As far as I know that document was only ever submitted

I recently had a high school assignment document get posted on a bunch of sites that sell homework help. As far as I know that document was only ever submitted directly to the assignment upload page. So somewhere along the line, I suspect on the plagiarism checker service, there was a hack and then 10 years later some random school assignment with my name on it is all over the place.