> This should have been caught at a security review stage during design, it should have been caught at the code review stage, it should have been caught by automated tests, it should have been caught by QA, it should have been caught once live by data tests, it should have been seen once live by analysts, it should have been fixed at so many different points.

Seems more likely this was done on purpose so if they got caught they could say "Junior engineer made a mistake. So sorry."