Ultimate Member <= 2.1.11 - Unauthenticated Privilege Escalation via User Meta

Improper Privilege Management
CVE CVE-2020-36155
CVSS 10.0 (Critical)
Publicly Published November 9, 2020
Last Updated January 22, 2024
Researcher Chloe Chamberland - Wordfence


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 user's role. During the registration process, submitted registration details were passed to the update_profile function, and any metadata was accepted, e.g., wp_capabilities[administrator] for Administrator access.

Wordfence blocked 1,935 attacks targeting this vulnerability in the past 24 hours.



Vulnerability Details for Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin

Software Type Plugin
Software Slug ultimate-member (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.1.12, or a newer patched version
Affected Version
  • < 2.1.12
Patched Version
  • 2.1.12

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