You should go watch any of the numerous blackhat presentations on wasm or just talk to some of the security researchers out there. You can do attacks that most people haven't been able to do for 20+ years.
> You can do attacks that most people haven't been able to do for 20+ years.
This is a bad and roundabout way to say that vulnerabilities in WebAssembly modules may still cause a corruption in their linear memory. Which is absolutely true, but those attacks still matter today (not everyone turns ASLR on) and similar defences also apply. In the future multiple memories [1] should make it much easier to guard against remaining issues. WebAssembly is a lucrative target only because it is so widespread and relatively young, not because it has horrible security (you don't know how the actually horrible security looks like).
