WordPress Mega Menu – QuadMenu <= 3.2.0 - Cross-Site Request Forgery to Limited User Meta Update

Vulnerability Description

The WordPress Mega Menu – QuadMenu plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.2.0. This is due to missing or incorrect nonce validation on the ajax_dismiss_notice() function. This makes it possible for unauthenticated attackers to update any user meta to a value of one, including wp_capabilities which could result in a privilege deescalation of an administrator, via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/1ba7b675-54d6-4f0e-b60f-1c7fa6ff24ea?source=cve
• https://plugins.trac.wordpress.org/browser/quadmenu/tags/3.2.0/lib/class-admin.php#L105
• https://plugins.trac.wordpress.org/changeset/3270825/quadmenu/tags/3.2.1/lib/class-admin.php