CVE-2026-1321
Membership Plugin – Restrict Content <= 3.2.20 - Unauthenticated Privilege Escalation via 'rcp_level'
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.
INFO
Published Date :
March 5, 2026, 8:15 a.m.
Last Modified :
March 5, 2026, 8:15 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update the Membership Plugin to the latest version.
- Verify plugin settings for active membership levels.
- Review user roles and permissions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-1321.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-1321 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-1321
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-1321 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-1321 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Mar. 05, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-862 Added Reference https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/class-rcp-registration.php#L107 Added Reference https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/memberships/class-rcp-membership.php#L1939 Added Reference https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/registration-functions.php#L1191 Added Reference https://plugins.trac.wordpress.org/browser/restrict-content/tags/3.2.15/core/includes/registration-functions.php#L1203 Added Reference https://plugins.trac.wordpress.org/changeset/3447187/ Added Reference https://plugins.trac.wordpress.org/changeset/3460177/ Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/abfaa4a6-92b0-4233-b08d-e668090d3fc2?source=cve