Cross-site scripting in Booking calendar, Appointment Booking System - CVE-2018-5672

Detailed vulnerability description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via the wp-admin/admin.php form_field5[label] parameter. 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.

How to mitigate CVE-2018-5672

Sources

• https://github.com/d4wner/Vulnerabilities-Report/blob/master/booking-calendar.md
• https://plugins.trac.wordpress.org/changeset/1802633/booking-calendar