It's if you write a program that allows the end user to call a command prompt and don't carefully sanitize the input, bad things could happen.
I mean, maybe Windows could do something different but if you wrote JavaScript that takes text input from a webpage and pass it to "sudo bash ##commands", you're going to have a bad time.
It's complete click bait because Rust has a reputation for security.
Critical Rust flaw enables Windows command injection attacks (www.bleepingcomputer.com)