Re: XSS on Yahoo Mail
From: Jim Ley (jim_at_jibbering.com)
To: firstname.lastname@example.org Date: Thu, 24 Nov 2005 19:28:45 -0000
"Will Wesley" <email@example.com> wrote in message
>This is not exactly a problem with Yahoo!, but rather
>a problem with the way browsers tend to render HTML
>when forced to deal with broken tags.
So it's a problem with Yahoo, as they allow the email, to write to places on
the screen that is not part of the email. I agree this is certainly down to
the liberalness of the browsers parser, but that doesn't mean yahoo can
ignore it, it's just a demonstration of how difficult a job it is for people
who want to accept arbitrary HTML to be secure for their user
Of course there is a pretty simple solution, which is to just use an IFRAME,
then there's no way the email to escape into the surrounding chrome.