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•Re: Re: Preventing Cross-site Scripting Attacks

by merlyn (Sage)
on Feb 23, 2002 at 01:56 UTC ( #147021=note: print w/ replies, xml ) Need Help??

in reply to Re: Preventing Cross-site Scripting Attacks
in thread Preventing Cross-site Scripting Attacks

I was pointing out the dangers of user-permitted HTML markup many years ago when I talked about how I was including Barney the Dinosaur into guestbooks on my home page.

I don't think there's a completely secure solution. tilly wrote a fairly nice strongbox solution that permits very carefully a subset of HTML, but it's more in the "only permitted things allowed" realm than the "look for bad things and prevent them" realm. Given the risk, I'd say this is the right approach.

-- Randal L. Schwartz, Perl hacker

update: Thanks to mdillon for the link for tilly's node.

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Re: Re: Re: Preventing Cross-site Scripting Attacks
by mdillon (Priest) on Feb 23, 2002 at 02:13 UTC

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