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FirstClass "TargetName" Parameter Cross Site Scripting Vulnerability
Secunia Advisory: SA11191
Release Date: 2004-03-23
Popularity: 5,385 views

Critical:
Less critical
Impact: Cross Site Scripting
Where: From remote
Solution Status: Unpatched

Software:FirstClass 7.x

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Description:
Richard Maudsley has reported a vulnerability in FirstClass, allowing malicious people to conduct Cross Site Scripting attacks.

The problem is that input passed to the "TargetName" parameter in "/.Templates/Commands/Upload.shtml" isn't properly verified before it is returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of a vulnerable site.

Solution:
Filter malicious requests using a firewall or a proxy server.

Provided and/or discovered by:
Richard Maudsley


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