[Full-Disclosure] Script Injection in Google Groups Beta

[n3td3v <xploitable@xxxxxxxxx>]

When I was testing Google Groups Beta
(http://groups-beta.google.com/group/n3td3v) I found the script tags
executed on the Google Groups site. This only seems to work while
clicking on a reply thread, using the reply menu, featured on a given
groups homepage, when an older thread gets a reply.

If the thread reply you try to open has a script in it, then the
script executes, instead of taking you to the reply to the thread you
were attempting to view.

An attacker can send a reply to a thread on Google Groups Beta with a
carefully crafted script in it, to exploit Google Group Beta users!

This is probably just the tip of the ice berg of something bigger, but
I thought I better mention it before malicious users started
exploiting people.

Discovered today by n3td3v.

Thanks, n3td3v.
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