Defending Against CSS-Based Attacks: Best Practices for Web Security
Most of us think of CSS as harmless. It paints the page. It can’t run code, it can’t read your keystrokes,
Most of us think of CSS as harmless. It paints the page. It can’t run code, it can’t read your keystrokes,
A user lands on your page, sees a friendly button, and clicks it. Nothing looks wrong. But the click never went
You ship a Content Security Policy, see the header show up in DevTools, and feel safe. That feeling is the trap.
You click a button that says “Play.” Nothing seems to happen. But the click didn’t land on the button you saw.
A stylesheet feels harmless. It picks fonts, sets colors, nudges spacing. Nobody audits CSS the way they audit a login form,