

Any webserver you browse is possibly capable of ACE depending on the implementation. When it starts to hold user data is when that starts to be a big concern. The more points of entry, the more that needs to be secured.
I don’t have any experience with piefed admin, or any opinion on piefed itself, just too many years of web admin experience. And as soon as I see intentionally made doors that allow code input, I start to worry about how much experience the devs who made it have with web admin.
As others have pointed out, it does still require (with some caveats about the infra setup) the user to be an admin. But if someone manages to get in to the interface, or another person is granted admin access who shouldn’t have been, it makes it more risky than it needs to be. It also for me is a design choice that indicates other parts of the system should be carefully examined for how they’re handling and sanitizing input.