full-disclosure - Paypal XSS Vulnerability

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Message-ID: <eb0de0f1003261246u7283c5aetb15c87ae310c3ba5@mail.gmail.com>
Date: Fri, 26 Mar 2010 15:46:09 -0400
From: Wesley Kerfoot <wjak56@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Paypal XSS Vulnerability

Paypal is affected by an XSS vulnerability where it fails to validate
input for the following url:

https://www.paypal.com/xclick/business=

One can add arbitrary javascript with no need for any filter evasion.

    https://www.paypal.com/xclick/business=<script> alert("xss"); </script>

As far as I know only the above url is affected. All of the usual XSS
attacks will work with this.

Cheers.

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