Bypassing CSP via DOM clobbering

You might have found HTML injection, but unfortunately identified that the site is protected with CSP. All is not lost, it might be possible to bypass CSP using DOM clobbering, which you can now detect using DOM Invader! In this post we’ll show you how.

We’ve based the test case on a bug bounty site, so you’re likely to encounter similar code in the wild. If you’re unfamiliar with DOM clobbering then head over to our Academy to learn about this attack class and solve the labs.