CVE-2026-11963 — HIGH (8.1)

Vulnerability Description

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 any authenticated user such as a subscriber to change another user's WordPress role and membership tier.

CVSS Score

8.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

References

https://wpscan.com/vulnerability/a34a916a-983e-48a5-8f10-99214ee3b613/

FAQ

What is CVE-2026-11963?

CVE-2026-11963 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 identifie...

How severe is CVE-2026-11963?

CVE-2026-11963 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-11963?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.