By appending just a few lines of HTML and CSS code, researcher Louis Dion-Marcil showed how an external sender could hide the very warning from an email message.

A new in-depth guide published by cybersecurity researchers from Cisco Talos outlines how cybercriminals are abusing HTML and CSS properties in email messages, setting the width of some elements ...

Hidden text refers to content embedded in a webpage's code that remains invisible to users viewing the page in a browser. Techniques such as HTML or CSS styling are commonly used to conceal this ...