What is the CVSS score of CVE-2026-1321?

CVE-2026-1321 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of WordPress are affected by CVE-2026-1321?

A privilege escalation vulnerability in the WordPress Membership Plugin (versions up to 3.2.20) allows attackers to gain unauthorized administrative access to affected websites.

How to fix or mitigate CVE-2026-1321?

Within 24 hours: Audit all WordPress installations for the Membership Plugin and document affected systems; consider taking the plugin offline if business operations allow. Within 7 days: Implement Web Application Firewall (WAF) rules to block exploitation attempts and restrict plugin functionality to trusted IP ranges only; evaluate alternative membership plugins. Within 30 days: Migrate to a patched alternative plugin or establish a vendor communication plan for patch availability; conduct security assessment of compromised systems if exploitation is suspected.

WordPress CVE-2026-1321

HIGH

Missing Authorization (CWE-862)

2026-03-05 security@wordfence.com

WordPress Authentication Bypass Privilege Escalation

8.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.1 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 22, 2026 - 21:37 vuln.today

cvss_changed

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 05, 2026 - 08:15 nvd

HIGH 8.1

DescriptionCVE.org

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.

AnalysisAI

Unauthenticated attackers can escalate privileges in WordPress installations using the Membership Plugin - Restrict Content (versions up to 3.2.20) by registering with arbitrary membership levels, including inactive levels or those granting administrator access, due to insufficient validation of the rcp_level parameter. This allows attackers to bypass payment requirements and gain unauthorized administrative roles without authentication. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-862 (Missing Authorization). Affects Restrict Content. 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 poss