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PostNuke Cross-Site Scripting Vulnerabilities
Secunia Advisory: SA9054
Release Date: 2003-06-17
Last Update: 2004-09-10
Popularity: 7,285 views

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

Software:PostNuke 0.x

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Description:
Three different Cross Site Scripting vulnerabilities have been identified in PostNuke.

The problem is that certain input isn't verified properly. While certain malicious tags are filtered it is still possible to inject malicious scripts using tag parameters.

Examples:
/user.php?op=confirmnewuser&module=NS-NewUser&uname=%22%3E%3Cimg%20src=evil_script
/modules.php?op=modload&name=FAQ&file=index&myfaq=yes&id_cat=1&
categories=%3Cimg%20src=evil_script
/modules.php?letter=%22%3E%3Cimg%20src=evil_script

This has been reported to affect version 0.723-Phoenix

Solution:
Update to version 0.726 or later.

Provided and/or discovered by:
David F. Madrid

Changelog:
2004-09-10: Updated "Solution" section.

Original Advisory:
http://nautopia.org/vulnerabilidades/postnuke_xss.htm


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