Vulnerability Description
The Membership Plugin – Restrict Content plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.2.20. This is due to the `rcp_setup_registration_init()` function accepting any membership level ID via the `rcp_level` POST parameter without validating that the level is active or that payment is required. Combined with the `add_user_role()` method which assigns the WordPress role configured on the membership level without status checks, this makes it possible for unauthenticated attackers to register with any membership level, including inactive levels that grant privileged WordPress roles such as Administrator, or paid levels that charge a sign-up fee. The vulnerability was partially patched in version 3.2.18.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/inc
- https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/inc
- https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/inc
- https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/inc
- https://plugins.trac.wordpress.org/changeset/3447187/
- https://plugins.trac.wordpress.org/changeset/3460177/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/abfaa4a6-92b0-4233-b08
FAQ
What is CVE-2026-1321?
CVE-2026-1321 is a vulnerability with a CVSS score of 8.1 (HIGH). The Membership Plugin – Restrict Content plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.2.20. This is due to the `rcp_setup_registration_init()` fun...
How severe is CVE-2026-1321?
CVE-2026-1321 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-2026-1321?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.