I’m afraid you’ve been horribly misled.
Also, HTML is a markup language, not a piece of software. It only describes the layout of web pages, so there is nothing insecure about HTML.
WordPress also uses HTML, because WordPress is a web application. Everything you see in a browser, on any web site, whether it’s WordPress, ASP.NET, Java, PHP, Django or whatever else, uses HTML to display the page.
You cannot make a web page without using HTML, and there is nothing insecure about HTML.
solved HTML or ASP for a website [closed]