This week, a researcher has disclosed how certain characters could be injected into JavaScript code to introduce invisible backdoors and security vulnerabilities.

Hello, I'm trying to limit the amount of characters that are entered into a textbox upon keydown/keyup. I have a working piece of javascript as well as a working onkeydown and onkeyup javascript ...

A short bootstrap script retrieves the hidden payload using a JavaScript Proxy 'get () trap.' When the hidden property is accessed, the Proxy converts the invisible Hangul filler characters back ...