What is CVE-2026-11966?

CVE-2026-11966 is a medium-severity vulnerability in User Registration & Membership, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-07-17.

How severe is CVE-2026-11966?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in User Registration & Membership

CVE-2026-11966

The User Registration & Membership WordPress plugin before 5.2.3 does not perform a capability check for unauthenticated callers on one of its membership payment actions and acts on a caller-supplied user identifier, allowing unauthentica…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Unknown User Registration & Membership — versions 4.2.3

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-11966?: CVE-2026-11966 is a medium-severity vulnerability in User Registration & Membership, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-07-17.
How severe is CVE-2026-11966?: Medium severity. CVSS v3 base score is 5.3 out of 10.