Details

Product: eXV2.de CMS <= 2.0.5.
Severity: moderated
Remote-Exploit: yes
Vendor-URL: http://www.exv2.de/
Vendor-Status: informed
Advisory-Status: published

Credits

Discovered by: Vision aka n-tier
http://www.i-s-o.org

Original Advisory:

http://www.i-s-o.org/security.txt

Introduction

eXV2.de CMS is a Content Management System.

More Details

1. Cross Site Scripting:
   Input passed directly to the "set_lang" parameter in the Browser Cookie is not properly sanitised before being returned to the user.
   A user can sent a cookie to himself with ?/set_lang=deutsch and edit it.
   This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Workaround: [Cross Site Scripting]

Edit the source code to ensure that input is properly sanitised.

Example:

$my_Cookie_Vars = $_COOKIE;

if (isset($my_Cookie_Vars['set_lang'])){
if (($my_Cookie_Vars['set_lang'] == "deutsch")||($my_Cookie_Vars['set_lang'] == "english")||($my_Cookie_Vars['set_lang'] == "french")) {
} else {
$abuse = true;
$xoopsConfig['language'] = $xoopsConfig['default_language'];
}
}

if ($abuse){
die("The desired action could not be performed.");
}

History/Timeline

7.08.2007 discovery of the vulnerabilities
8.08.2007 additional tests with other versions
10.08.2007 contacted the vendor