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Page2Flip 2.5 Cross Site Scripting

Page2Flip 2.5 Cross Site Scripting
Posted Aug 25, 2015
Authored by Dr. Erlijn van Genuchten | Site syss.de

Page2Flip version 2.5 suffers from a cross site scripting vulnerability in the create user functionality.

tags | exploit, xss
SHA-256 | 8c4a6a8c8fb7c3e5d54cac7cab64b3e9ec1fd020d73d675cbf2229ba4b628693

Page2Flip 2.5 Cross Site Scripting

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Hash: SHA512

Advisory ID: SYSS-2015-027
Product: Page2Flip
Vendor: w!ssenswerft GmbH
Affected Version(s): Premium App 2.5, probably also in Business App
and Basic App, and in lower versions
Tested Version(s): Premium App 2.5
Vulnerability Type: Cross-Site Scripting (CWE-79)
Risk Level: Medium
Solution Status: Open
Vendor Notification: 2015-06-29
Solution Date:
Public Disclosure:
CVE Reference: Not yet assigned
Author of Advisory: Dr. Erlijn van Genuchten (SySS GmbH)



With the Page2Flip Web application, it is possible to create e-papers in
PDF format that can be flicked through digitally. Such e-papers can be
used for magazines, catalogues, flyers, etc. (see [1]).

The Page2Flip application is vulnerable to HTML injection attacks. This
allows users to send e-mails with almost any content to another user in
the name of the Page2Flip team.


Vulnerability Details:

The SySS GmbH identified a vulnerability in the "create user"
functionality of the Page2Flip application.

At least the parameters "first name" and "last name" are not sanitized
sufficiently resulting in the possibility to inject arbitrary HTML code
that changes the content of the "your registration" e-mail. This HTML
e-mail is sent to the given e-mail address of a newly created user

The described cross-site scripting vulnerability can be exploited in the
context of an authenticated administrative user and allows an attacker
to send an e-mail with almost any content in the name of the Page2Flip
team to the victim.


Proof of Concept (PoC):

The following HTTP POST request using the HTML code
"<div+style="display:none;">" as the value for the parameter "nachname"
demonstrates that HTML code can be injected:

POST /settings/users HTTP/1.1
Host: [host]
Faces-Request: partial/ajax
Content-Type: application/x-www-form-urlencoded;charset=UTF-8
Content-Length: 1198
Cookie: [cookies]


The HTML e-mail source code of the resulting e-mail of the PoC contains
the following HTML code

Hello <div style="display:none;"> xxx <br>

rendering all subsequent automatically added content invisible.




Disclosure Timeline:

2015-06-23: Vulnerability discovered
2015-06-29: Vulnerability reported to vendor
2015-07-07: Reported vulnerabilities again as the vendor did not respond
to the first e-mail
2015-07-14: Reminder sent concerning reported vulnerabilities
2015-08-24: Public release of security advisory according to the SySS
Responsible Disclosure Policy



[1] Page2Flip homepage
[2] SySS Responsible Disclosure Policy



This security vulnerability was found by Dr. Erlijn van Genuchten of the
SySS GmbH.

E-Mail: erlijn.vangenuchten@syss.de
Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Erlijn_vanGenuchten.asc
Key ID: 0xBD96FF2A
Key Fingerprint: 17BB 4CED 755A CBB3 2D47 C563 0CA5 8637 BD96 FF2A



The information provided in this security advisory is provided "as is"
and without warranty of any kind. Details of this security advisory may
be updated in order to provide as accurate information as possible. The
latest version of this security advisory is available on the SySS Web



Creative Commons - Attribution (by) - Version 3.0
URL: http://creativecommons.org/licenses/by/3.0/deed.en

Version: GnuPG v1

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