CVE-2020-36155 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://wpscan.com/vulnerability/cf13b0f8-5815-4d27-a276-5eff8985fc0b https://wordpress.org/plugins/ultimate-member/#developers https://www.wordfence.com/blog/2020/11/critical-privilege-escalation-vulnerabilities-affect-100k-sites-using-ultimate-member-plugin/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8