User Registration & Membership Plugin up to 5.1.2 on WordPress role privileges management

Summaryinfo

A vulnerability labeled as critical has been found in User Registration & Membership Plugin up to 5.1.2 on WordPress. Affected is an unknown function of the component User Registration Handler. Such manipulation of the argument role leads to Remote Code Execution. This vulnerability is uniquely identified as CVE-2026-1492. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in User Registration & Membership Plugin up to 5.1.2 on WordPress and classified as critical. Affected by this issue is an unknown part of the component User Registration Handler. The manipulation of the argument role with an unknown input leads to a remote code execution vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The User Registration & Membership – Custom Registration Form Builder, Custom Login Form, User Profile, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to improper privilege management in all versions up to, and including, 5.1.2. This is due to the plugin accepting a user-supplied role during membership registration without properly enforcing a server-side allowlist. This makes it possible for unauthenticated attackers to create administrator accounts by supplying a role value during membership registration.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-1492. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/04/2026). The MITRE ATT&CK project declares the attack technique as T1068.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202603-373). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Name

• User Registration & Membership Plugin

Version

• 5.1.0
• 5.1.1
• 5.1.2

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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