SB2018072026 - Cross-site scripting in Multi Step Form for WordPress

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2018-14430)

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.

Remediation

Install update from vendor's website.

References

• https://hackpuntes.com/cve-2018-14430-wordpress-plugin-multi-step-form-125-multiples-xss-reflejados/
• https://plugins.trac.wordpress.org/changeset/1917500/multi-step-form