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Vulnerabilities

Vulnerability · CVE-2026-1321

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, 2026 · catalog updated Jun 17, 2026 · The Membership Plugin –

Check if you run it

No confirmed exploitation is on record for CVE-2026-1321. EPSS is 0.36%. Act only if a listed version of The Membership Plugin – is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Membership Plugin –).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.36%
Remediation
Version ranges on file
Affected products
stated named in the record

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 function accepting any membership level ID via the POST parameter without validating that the level is active or that payment is required. Combined with the 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 3.2.20

How to fix CVE-2026-1321

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-1321. EPSS is 0.36%. Act only if a listed version of The Membership Plugin – is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 3.2.20. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.36%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 5, 2026 · NIST NVD

    Detected

    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 function accepting any membership level ID via the POST parameter without validating that the level is active or that payment is required. Combined with the method which assigns the WordPress role configured on the membership level wit

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 function accepting any membership level ID via the POST parameter without validating that the level is active or that payment is required. Combined with the method which assigns the WordPress role configured on the membership level wit

Sources

  • CVE.orgVulnerability recordCVE-2026-1321

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-1321

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-1321

    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 function accepting any membership level ID via the POST parameter witho

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.