WordPress Ultimate Member Plugin Improper Privilege Management Vulnerability - CVE-2020-36155

An issue was discovered in the Ultimate Member plugin before 2.1.12 for WordPress aka Unauthenticated Privilege Escalation via User Meta. An attacker could supply an array parameter for sensitive metadata such as the wp_capabilities user meta that defines a user39s role. During the registration process submitted registration details were passed to the update_profile function and any metadata was accepted e.g. wp_capabilitiesadministrator for Administrator access.