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by marcosdumay 1348 days ago
I dunno. The frontend just made a TLS connection to his server and downloaded an HTML page. I don't think displaying that page adds any extra vulnerability.

If he put it in a sandboxed iframe, it will have the same kinds of access as the main page, because it comes from the same domain. Everything is already as messed up as it can be, and there isn't anything the frontend can do to improve it.