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gp Easy CMS Minishop 1.5 Cross Site Scripting

gp Easy CMS Minishop 1.5 Cross Site Scripting
Posted Jul 3, 2012
Authored by Carlos Mario Penahos Hollmann

gp Easy CMS with Minishop plugin version 1.5 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 6d4b62f9487a164867af96f8d469b70aabc6091f5ecec316b4a62639a6cb766b

gp Easy CMS Minishop 1.5 Cross Site Scripting

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# Exploit Title: gp easy CMS Minishop 1.5 plugin persistent XSS
# Date: july 2 2012
# Exploit Author: Carlos Mario Penahos Hollmann
# Vendor Homepage:http://gpeasy.com/Download
# Software Link: http://gpeasy.com/Special_Addon_Plugins?cmd=download&id=31
# Version: 1.5




The vulnerable code is in the Minishop 1.5 plugin on the Admin_Minishop.php
, after installing it give to any user right to edit the minishop, then
this user can inject arbitrary javascript code when using add product or
add category(both options can trigger the XSS) in the name field typing
<script>alert('XSS');</script>

As you can see data is not sanitize :)
function AddCategory()
{
require('Language.php');
echo '<b>' . $Mtxt['Add Category'] .'</b><br>';
$ca = & $_REQUEST['cat'];
$cat = $this->my_replace($ca, "no");
$catdes = & $_REQUEST['catdesc'];
$catdesc= $this->my_replace($catdes, "yes");
$Category = $this->GetCategories();

if (empty($cat) )
{
echo '<table class="bordered"><br>';
echo '<th>Category</th><th>Description</th>';
echo '<form action="Admin_Minishop?cmd=addcat"><br>' ;
echo '<tr><td><input type="text" name="cat" size="10" value="'
. $cat . '"></td>';
echo '<td><input type="text" name="catdesc" size="30" value="'
. $catdesc . '"></td></tr>';
echo '<input type="hidden" name="cmd" value="addcat"><br>';
echo '</table><br>';
echo '<input type="submit" value="' . $Mtxt['Add Category'] .
'">';

}
else
{
$Category[$cat] = $catdesc;//echo 'Debug:' .
var_dump($Category) .':';
$this->SaveCategories($Category);
}
}


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