# Exploit Title: Wordpress Cart66 Plugin 1.5.1.14 Multiple Vulnerabilities
# Exploit Author:absane
# Blog: http://blog.noobroot.com
# Discovery date:September 29th 2013
# Vendor notified: September 29th 2013
# Vendor fixed: October 2 2013
# Vendor Homepage: http://cart66.com
# Software Link:
http://downloads.wordpress.org/plugin/cart66-lite.1.5.1.14.zip
# Tested on: Wordpress 3.6.1
# Google-dork: inurl:/wp-content/plugins/cart66
# CVE (CSRF):CVE-2013-5977
# CVE (XSS): CVE-2013-5978
Two vulnerabilities were discovered in the Wordpress plugin Cart66 version
1.5.1.14.
Vulnerabilities:
1) XSS (Stored)
2) CSRF
VULNERABILITY #1
***
*** Stored XSS ***
***
Page affected:
http://[victim_site]/wordpress/wp-admin/admin.php?page=cart66-products in the
following input fields:
* Product name
* Price description
Proof of Concept
In the vulnerable fields add alert(0)
The product name XSS vuln is particiularly dangerous because an attacker can
use the CSRF vulnerability to add a product whose
name is a malicious script. All the admin user needs to do is view the product
to be attacked.
//
\\
VULNERABILITY #2
*** CSRF ***
Page affected:
http://[victim_site]/wordpress/wp-admin/admin.php?page=cart66-products
If the Wordpress admin were logged in and clicked on a link hosting code
similar to the one in the PoC, then the admin may
unknowingly add a product to his site or have an existing product altered.
Other possibilities include, but are not limited
to, injecting code into a field vulnerable to stored XSS (see the second
vulnerability).
Proof of Concept
Host this code on a remote wesbserver different from the Wordpress site that
uses Cart66. As an authenticated Wordpress admin
user visit the page and add what you will to the fields. A new product is
added. In a live attack, the fields will be hidden,
prefilled, and some javascript code will auto submit the fields.
http://192.168.196.135/wordpress/wp-admin/admin.php?page=cart66-products";
method="post"
enctype="multipart/form-data" id="products-form">
document.csrf_form.submit();
][
]..SOLUTIONS.[
][
Grab the latest update! Or...
XSS
In products.php, replace the line:
$product->setData($_POST['product']);
with:
$product->setData(Cart66Common::postVal('product'));
CSRF
In products.php, replace the following:
with:
And, in Cart66Product.php replace the validate() function with:
public function validate() {
$errors = array();
if(!wp_verify_nonce($_POST['cart66_product_nonce'],
'cart66_product_nonce')) {
$errors['nonce'] = __("An unkown error occured, please try again
later","cart66");
}
else {
// Verify that the item number is present
if(empty($this->item_number)) {
$errors['item_number'] = __("Item number is required","cart66");
}
if(empty($this->spreedlySubscriptionId)) {
$this->spreedlySubscriptionId = 0;
}
// Verify that no other products have the same item number
if(empty($errors)) {
$sql = "SELECT count(*) from $this->_tableName where item_number = %s
and id != %d";
$sql = $this->_db->prepare($sql, $this->item_number, $this->id);
$count = $this->_db->get_var($sql);
if($count > 0) {
$errors['item_number'] = __("The item number must be
unique","cart66");
}
}
// Verify that if the product has been saved and there is a download path
that there is a file located at the path
if(!empty($this->download_path)) {
$dir = Cart66Setting::getValue('product_folder');
if(!file_exists($dir . DIRECTORY_SEPARATOR . $this->download_path)) {
$errors['download_file'] = __("There is no file available at the
download path:","cart66") . " " . $this-
>download_path;
}
}
}
return $errors;
}
