NL Portal: IDOR allows any authenticated user to complete and tamper with another user's taak
In versions from 1.5.0 up to and including 3.0.0, any authenticated portal user could complete and tamper with another user's open task by submitting it on their behalf. The task submission endpoint accepted a task ID and a payload, but it never checked whether the task actually belonged to the user making the call. An attacker who held a valid login (a normal burger OAuth token) and who knew or …