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4images 1.7.11 Cross Site Scripting

4images 1.7.11 Cross Site Scripting
Posted Sep 25, 2015
Authored by Manuel Garcia Cardenas

4images versions 1.7.11 and below suffer from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 09e7891c4a718461553424bee020d999e8f3b300137a5d41b358f57adf5a4e6b

4images 1.7.11 Cross Site Scripting

Change Mirror Download
=============================================
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


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