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CVE-2026-1321

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.

Published Mar 5, 2026CWE-862EPSS 0.36%

Overview

CVE-2026-1321 is a high-severity vulnerability. It was published on March 5, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refplugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/class-rcp-registration.php#L107Refplugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/memberships/class-rcp-membership.php#L1939Refplugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/registration-functions.php#L1191Refplugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/registration-functions.php#L1203Refplugins.trac.wordpress.org/changeset/3447187/Refplugins.trac.wordpress.org/changeset/3460177/Refwww.wordfence.com/threat-intel/vulnerabilities/id/abfaa4a6-92b0-4233-b08d-e668090d3fc2?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-1321?

CVE-2026-1321 is a high-severity vulnerability. It was published on March 5, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-1321?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-1321?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-1321?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-1321 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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