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Category:   Application (Forum/Board/Portal)  >   CMS Made Simple Vendors:   cmsmadesimple.org
CMS Made Simple Input Validation Flaw in Comments Module Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1017445
SecurityTracker URL:  http://securitytracker.com/id/1017445
CVE Reference:   CVE-2006-6844   (Links to External Site)
Updated:  May 20 2008
Original Entry Date:  Dec 27 2006
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.0.2
Description:   A vulnerability was reported in CMS Made Simple in the Comments module. A remote user can conduct cross-site scripting attacks.

The optional Comments module does not properly filter HTML code from user-supplied input before displaying the input. A remote user can submit a specially crafted comment that, when viewed by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the CMS Made Simple software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Some demonstration exploit comment text is provided:

<script type="text/javascript">alert('XSS')</script>

The original advisory is available at:

http://www.l0j1k.com/security/CMSMadeSimple_1.0.2_25Dec06.txt

L0j1k of D.I.E. Inc. discovered this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the CMS Made Simple software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   A fix is available at:

http://forum.cmsmadesimple.org/index.php?action=dlattach;topic=8960.0;attach=1563

The vendor's advisory is available at:

http://dev.cmsmadesimple.org/forum/forum.php?forum_id=938

Vendor URL:  www.cmsmadesimple.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Mon, 25 Dec 2006 18:13:33 -0300
Subject:  XSS - CMS Made Simple v1.0.2

Product: CMS Made Simple v1.0.2
Class: XSS
Website: http://www.cmsmadesimple.org
Found by: L0j1k of D.I.E. Inc.
Googledork: "powered by cms made simple"
-=-=-=-=-
- Summary:

Optional user comment module not properly sanitized for <script> tags.
-=-=-=-=-
- PoC:

Input the following into user comment form:

<script type="text/javascript">alert('XSS')</script>

-=-=-=-=-=-=-=-=-=-

More information can be found at:
http://www.l0j1k.com/security/CMSMadeSimple_1.0.2_25Dec06.txt

-=-=-=-=-=-=-=-=-=-

Merry Christmas everyone!

 
 


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