CSS Injection # warning This group of XS-Leaks requires a CSS injection on the target page. Among the different CSS injection vectors, the most noticeable one is the abuse of CSS Selectors. They can be used as an expression to match and select certain HTML elements. For example, the selector input[value^="a"] is matched if the value of an input tag starts with the character “a”. So, to detect if a CSS Selector matches the expression, attackers can trigger a callback to one of their websit...
