CTFNote is a collaborative tool aiming to help CTF teams to organise their work. This tool helps making notes during CTFs, so you can track your CTF notes at a later time. This is similar to the CTF pad seen in one of the video's of Liveoverflow.
Otherwise a false message is send that you cancelled the task but you didn't start the task previously.
Of course this can still be triggered by just calling the API, but this is not a security issue.
Otherwise a false message is send that you cancelled the task but you didn't start the task previously. Of course this can still be triggered by just calling the API, but this is not a security issue.