Contact Form Builder by vcita <= 4.10.3 - Cross-Site Request Forgery to Stored Cross-Site Scripting

Vulnerability Description

The Contact Form Builder by vcita plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.10.3. This is due to missing nonce validation on the ls_parse_vcita_callback function. This makes it possible for unauthenticated attackers to modify the plugin's settings and inject malicious JavaScript via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. While the Cross-Site Scripting issue was patched in version 4.10.1, the plugin is still technically vulnerable to Cross-Site Request Forgery since a capability check but no nonce check was added in 4.10.2.

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/61c39f5f-3b17-4e4d-824e-241159a73400?source=cve
• https://plugins.trac.wordpress.org/browser/contact-form-with-a-meeting-scheduler-by-vcita/trunk/system/parse_vcita_callback.php#L55
• https://blog.jonh.eu/blog/security-vulnerabilities-in-wordpress-plugins-by-vcita
• https://plugins.trac.wordpress.org/changeset/3200766/contact-form-with-a-meeting-scheduler-by-vcita/trunk/system/parse_vcita_callback.php