This will cause the IMAP3 server to return the data requested by the client in an error.
This error is then read by the browser and printed to the screen. This intra-protocol XSS is
actually quite common amongst ASCII controlled protocols, including echo (port 7).
Although echo is very uncommon these days, it is still important to note that other proto-
cols can be used to perform
XSS.
While the browsers do know about different ports, they
don't take that context in consideration when enforcing cross-domain restrictions. ...
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