In joystick/consumers/fedora_messaging_consumer.py, line 57, the source location for the images are taken and fully trusted from the message, which together with #7 means that any tool that ends its messages with a particular topic can upload any file as a fully trusted Fedora AWS image.
joystick/consumers/fedora_messaging_consumer.py
The image location is actually formed on the plume side through the configs. You can find the config here: https://github.com/coreos/mantle/blob/master/cmd/plume/fedora.go#L79
Here in config the image is believed to stay in https://github.com/coreos/mantle/blob/master/cmd/plume/fedora.go#L79
Metadata Update from @puiterwijk: - Issue status updated to: Closed (was: Open)