what you don't know can hurt you

Nibbleblog 4.0.1 Cross Site Scripting

Nibbleblog 4.0.1 Cross Site Scripting
Posted Nov 17, 2014
Authored by Manuel Garcia Cardenas

NibbleBlog versions 4.0.1 and below suffer from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 88c0a4583e04c435d39606aa8b68e2713c069f07aff5847cbfc33de6c91cf1f9

Nibbleblog 4.0.1 Cross Site Scripting

Change Mirror Download
=============================================
MGC ALERT 2014-002
- Original release date: March 5, 2014
- Last revised: November 17, 2014
- Discovered by: Manuel Garcia Cardenas
- Severity: 4,8/10 (CVSS Base Score)
=============================================

I. VULNERABILITY
-------------------------
Reflected XSS in Nibbleblog <= v4.0.1

II. BACKGROUND
-------------------------
Nibbleblog is a powerful engine for creating blogs, all you need is PHP to
work.

III. DESCRIPTION
-------------------------
Has been detected a reflected XSS vulnerability in Nibbleblog, 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
index.php parameters "author_name" and "content".

IV. PROOF OF CONCEPT
-------------------------
Malicious Request:
http://vulnerablesite.com/nibbleblog/index.php?controller=post&action=view&id_post=1
hash=10905d09405f5db41d3c6645fd23e72746f76106&author_name=<XSS
injection>&author_email=&content=<XSS injection>

Example:
http://vulnerablesite.com/nibbleblog/index.php?controller=post&action=view&id_post=1
hash=10905d09405f5db41d3c6645fd23e72746f76106&author_name=%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E&author_email=&content=%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E

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
-------------------------
Nibbleblog <= v4.0.1

VII. SOLUTION
-------------------------
Update to version 4.0.2

VIII. REFERENCES
-------------------------
http://www.nibbleblog.com/
http://blog.nibbleblog.com/post/nibbleblog-v4.0.2-coffee/

IX. CREDITS
-------------------------
This vulnerability has been discovered and reported
by Manuel Garcia Cardenas (advidsec (at) gmail (dot) com).

X. REVISION HISTORY
-------------------------
March 5, 2014 1: Initial release
November 17, 2014 2: Last revision

XI. DISCLOSURE TIMELINE
-------------------------
March 5, 2014 1: Vulnerability acquired by Manuel Garcia Cardenas
March 5, 2014 2: Send to vendor
March 7, 2014 3: New version that includes patched code
http://blog.nibbleblog.com/post/nibbleblog-v4.0.2-coffee/
November 17, 2014 4: 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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