4images 1.7.11 Cross Site Scripting

`=============================================  
MGC ALERT 2015-001  
- Original release date: September 08, 2015  
- Last revised: September 24, 2015  
- Discovered by: Manuel Garcia Cardenas  
- Severity: 4,8/10 (CVSS Base Score)  
=============================================  
  
I. VULNERABILITY  
-------------------------  
Stored XSS in 4images <= v1.7.11  
  
II. BACKGROUND  
-------------------------  
4images is a powerful web-based image gallery management system. Features  
include comment system, user registration and management, password  
protected administration area with browser-based upload and HTML templates  
for page layout and design.  
  
III. DESCRIPTION  
-------------------------  
Has been detected a stored XSS vulnerability in 4images, that allows the  
execution of arbitrary HTML/script code to be executed in the context of  
the victim user's browser.  
  
The code injection is done through the parameter warning in the page  
categories.php parameters "cat_description".  
  
IV. PROOF OF CONCEPT  
-------------------------  
Malicious Request:  
http://vulnerablesite.com/4images/admin/categories.php  
__csrf=&action=updatecat&cat_id=1&cat_name=example&cat_description=<XSS  
injection>&cat_parent_id=0&cat_order=5&cat_hits=2285&auth_viewcat=0&auth_viewimage=0&auth_download=2&auth_upload=2&auth_directupload=9&auth_vote=0&auth_sendpostcard=0&auth_readcomment=0&auth_postcomment=2  
  
Example:  
http://vulnerablesite.com/4images/categories.php?cat_id=1  
  
V. BUSINESS IMPACT  
-------------------------  
An attacker can execute arbitrary HTML or script code in a targeted user's  
browser, this can leverage to steal sensitive information as user  
credentials, personal data, etc.  
  
VI. SYSTEMS AFFECTED  
-------------------------  
4images <= v1.7.11  
  
VII. SOLUTION  
-------------------------  
Update to the last version.  
  
VIII. REFERENCES  
-------------------------  
http://www.4homepages.de/  
  
IX. CREDITS  
-------------------------  
This vulnerability has been discovered and reported  
by Manuel Garcia Cardenas (advidsec (at) gmail (dot) com).  
  
X. REVISION HISTORY  
-------------------------  
September 08, 2015 1: Initial release  
September 24, 2015 2: Last revision  
  
XI. DISCLOSURE TIMELINE  
-------------------------  
September 08, 2015 1: Vulnerability acquired by Manuel Garcia Cardenas  
September 08, 2015 2: Send to vendor  
September 24, 2015 3: Sent to lists  
  
XII. LEGAL NOTICES  
-------------------------  
The information contained within this advisory is supplied "as-is" with no  
warranties or guarantees of fitness of use or otherwise.  
  
XIII. ABOUT  
-------------------------  
Manuel Garcia Cardenas  
Pentester  
  
  
`