Twenty Year Anniversary

WordPress FormBuilder 1.05 Cross Site Scripting

WordPress FormBuilder 1.05 Cross Site Scripting
Posted Aug 4, 2016
Authored by Securify B.V., Peter Ganzevles

WordPress FormBuilder version 1.05 suffers from a cross site scripting vulnerability.

tags | exploit, xss
MD5 | be4a42ddd453f70dc3aaf7695a8c475c

WordPress FormBuilder 1.05 Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Cross-Site Scripting in FormBuilder WordPress Plugin
------------------------------------------------------------------------
Peter Ganzevles, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A Reflected Cross-Site Scripting (XSS) vulnerability has been found in
the FormBuilder WordPress Plugin. By using this vulnerability an
attacker can inject malicious JavaScript code into the application,
which will execute within the browser of any logged-in admin.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160722-0007

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on FormBuilder version 1.05.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue is resolved in FormBuilder version 1.06.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/cross_site_scripting_in_formbuilder_wordpress_plugin.html

The FormBuilder plugin is vulnerable to a Reflected Cross Site Scripting attack in the main page. This means that an attacker can craft a link, such as the one below, which will inject malicious javascript in the page of any admin visiting it.

The vulnerability lies in a piece of code in the file html/options_default.inc.php. Here, on line 35-40, the following form class is created:

35: <form class='formSearch' name="formSearch" method="GET" action="<?php echo FB_ADMIN_PLUGIN_PATH; ?>">
36: <input name='page' type="hidden" value="<?php echo $_GET['page']; ?>" />
37: <input name='pageNumber' type="hidden" value="<?php echo $_GET['pageNumber']; ?>" />
38: <input name='formSearch' type="text" size="10" value="<?php echo $formSearch; ?>" />
39: <input class='searchButton' name='Search' type="submit" value="Search" />
40: </form>
This form has two input fields which are populated with data directly from a GET parameter, which is not sanitized beforehand. These are $_GET['pagea] and $_GET['pageNumbera]. While supplying a malicious payload to the $_GET[apageNumbera] parameter causes the application to just throw an error, supplying it to the $_GET[apagea] parameter will cause it to be executed.

Proof of concept
The following URL causes an alert box to spawn, which, while not dangerous in and of itself, is an easy way to prove that it is vulnerable.

http://<target>/wp-admin/tools.php?page=formbuilder.php&pageNumber=%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E&formSearch=test&Search=Search

------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

December 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Dec 1st
    11 Files
  • 2
    Dec 2nd
    1 Files
  • 3
    Dec 3rd
    18 Files
  • 4
    Dec 4th
    40 Files
  • 5
    Dec 5th
    16 Files
  • 6
    Dec 6th
    50 Files
  • 7
    Dec 7th
    12 Files
  • 8
    Dec 8th
    1 Files
  • 9
    Dec 9th
    1 Files
  • 10
    Dec 10th
    15 Files
  • 11
    Dec 11th
    30 Files
  • 12
    Dec 12th
    25 Files
  • 13
    Dec 13th
    7 Files
  • 14
    Dec 14th
    0 Files
  • 15
    Dec 15th
    0 Files
  • 16
    Dec 16th
    0 Files
  • 17
    Dec 17th
    0 Files
  • 18
    Dec 18th
    0 Files
  • 19
    Dec 19th
    0 Files
  • 20
    Dec 20th
    0 Files
  • 21
    Dec 21st
    0 Files
  • 22
    Dec 22nd
    0 Files
  • 23
    Dec 23rd
    0 Files
  • 24
    Dec 24th
    0 Files
  • 25
    Dec 25th
    0 Files
  • 26
    Dec 26th
    0 Files
  • 27
    Dec 27th
    0 Files
  • 28
    Dec 28th
    0 Files
  • 29
    Dec 29th
    0 Files
  • 30
    Dec 30th
    0 Files
  • 31
    Dec 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close