As classic client-side vulnerabilities like XSS and CSRF get patched, CSP’d and SameSite’d into oblivion, niche attack techniques like DOM Clobbering are becoming ever more relevant. Michał Bentkowski recently used DOM Clobbering to exploit GMail, six years after I first introduced the technique in 2013. In this post, I’m going to quickly introduce DOM Clobbering, expand on my original research with some new techniques, and share two interactive labs so you can try the techniques out for yourself.

source: R