Confection 0.4.0 - 0.4.7 - Unauthenticated RCE via Write Key Option

The Confection WordPress Cable WordPress plugin from 0.4.0 to 0.4.7 does not perform any capability or nonce checks before saving its settings and writing one of them, unmodified, into a standalone PHP file that it then serves, allowing unauthenticated users to execute arbitrary PHP code on the server.