I'm using Chromium and even the link with `rel=noopener` seems to be able to "hax" the first page. Am I reading it wrong or is `rel=noopener` supposed to protect against this?
Instead, the two links present two different angles to the same problem. The first link demonstrates the attack using a page within the same domain (reasonable), and the second demonstrates that it will continue to work even when the link points to a page ordinarily restricted by cross-origin policies (potentially surprising).
If you manually add `rel=noopener` to either link, the attack won't work. Try it with DevTools.