This script is an XSS attack controller which allows an attacker to force a victim to read pages off a XSS vulnerable server and relay contents back to this controller. This process also provides client with new script commands.
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Advanced Cross-Site-Scripting with Real-time Remote Attacker Control - Some people think XSS attacks are no big deal, but I plan to change that perception with the release of this paper and an accompanying tool called XSS-Proxy which allows XSS attacks to be fully controlled by a remote attacker. This paper describes current XSS attacks and introduces new methods/tool for making XSS attacks interactive, bi-directional, persistent and much more evil. This is not a detailed XSS HowTo, but an explanation of methods for taking XSS attacks much further. Attackers can access sites as the victim or forward specific blind requests to other servers.
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