GHSA-55HG-8QXV-QJ4P PhoenixStorybook: Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground

Summary An unsafe HEEx template generation vulnerability allows any unauthenticated user to execute arbitrary code on the server. The phoenixstorybook playground accepts user-controlled attribute values over WebSocket and interpolates them unsanitized into a HEEx template that is subsequently...