F-Secure SAFE XPC service exploitation (CVE-2020-14978) Link to heading Intro Link to heading In this post we will look into an other case study which will show us (again) why XPC client verification is crucial in XPC security, and how added authorization checks can slightly improve (but not fix) the problem. The F-Secure SAFE XPC services installed on macOS were not sufficiently hardened, and a malicious actor had the ability to interact with them.