10/30/2026
How do attackers go after an iFrame? Because an iframe is a window embedded in your page, attackers try to either cover the window or intercept what's typed into it:
- The pixel-perfect overlay: Malicious JavaScript detects the checkout page and draws an invisible layer directly on top of the real iframe. The customer thinks they're typing into your processor's secure form. They're actually typing into the attacker's layer sitting one pixel above it.
-The proxy attack: A more advanced move where the attacker rewrites your site's code so the iframe loads from a look-alike domain (say, "Stripe-Global-Security.com") instead of the real processor. The fake page captures the data, then quietly hands the customer back to the real checkout so nothing looks wrong.
- The double-entry trick: A fake "Error: please re-enter your card details" message appears. The first entry goes to the thief. The second goes to the real form and customers assume it was a glitch.
https://www.securitymetrics.com/blog/redirects-and-iframes-are-being-hacked-how-does-this-impact-saq-a