What is CVE-2026-11963?

CVE-2026-11963 is a high-severity vulnerability in User Registration & Membership, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 8.1/10. Published 2026-07-13.

How severe is CVE-2026-11963?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in User Registration & Membership

CVE-2026-11963

The User Registration & Membership WordPress plugin before 5.2.2 does not perform an authorization check on a membership-upgrade action and derives the user to modify from a caller-supplied identifier instead of the current user, allowing…

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Unknown User Registration & Membership — versions 0

References

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

Frequently asked questions

What is CVE-2026-11963?: CVE-2026-11963 is a high-severity vulnerability in User Registration & Membership, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 8.1/10. Published 2026-07-13.
How severe is CVE-2026-11963?: High severity. CVSS v3 base score is 8.1 out of 10.