Cross-site scripting in Multi Step Form - CVE-2018-14430
Published: August 2, 2019
Multi Step Form
Detailed vulnerability description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via the fw_data [id][1], fw_data [id][2], fw_data [id][3], fw_data [id][4], or email field of the contact form, exploitable with an fw_send_email action to wp-admin/admin-ajax.php.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.