Cross-Site Scripting (XSS) in CMSimple

[High-Tech Bridge Security Research <advisory@xxxxxxxxxxxx>]

Advisory ID: HTB23205
Product: CMSimple
Vendor: Preben Bjorn Biermann Madsen
Vulnerable Version(s): 3.54 and probably prior
Tested Version: 3.54
Advisory Publication:  February 26, 2014  [without technical details]
Vendor Notification: February 26, 2014 
Vendor Patch: February 26, 2014 
Public Disclosure: March 19, 2014 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2014-2219
Risk Level: Medium 
CVSSv2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in CMSimple, 
which can be exploited to perform Cross-Site Scripting (XSS) attacks.


1) Reflected Cross-Site Scripting (XSS) in CMSimple: CVE-2014-2219

The vulnerability exists due to insufficient sanitisation of user-supplied data 
in "d" HTTP GET parameter passed to "/whizzywig/wb.php" script. A remote 
attacker can trick a logged-in user to open a specially crafted link and 
execute arbitrary HTML and script code in browser in context of the vulnerable 
website.

The exploitation example below uses the JavaScript "alert()" function to 
display "immuniweb" word:

http://[host]/whizzywig/wb.php?d=%27%3E%3Cscript%3Ealert%28%27immuniweb%27%29;%3C/script%3E


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Solution:

Fixed by vendor on February 26, 2014 directly in the source code without 
version modification/new release. Update to the version 3.54 released after 
February 26, 2014.

More Information:
http://sourceforge.net/projects/cmsimple-le/files/cmsimple_classic/

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References:

[1] High-Tech Bridge Advisory HTB23205 - 
https://www.htbridge.com/advisory/HTB23205 - Cross-Site Scripting (XSS) in 
CMSimple.
[2] CMSimple - http://cmsimple.p2pnation.eu/ - CMSimple is a content management 
system primarily designed for easy creation and maintenance of small commercial 
sites, or sites for associations and individuals.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types.
[5] ImmuniWeb® - https://portal.htbridge.com/ - is High-Tech Bridge's 
proprietary web application security assessment solution with SaaS delivery 
model that combines manual and automated vulnerability testing.

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.