Improper Privilege Management in User Registration & Membership Plugin for WordPress

CVE-2026-1492

What is CVE-2026-1492?

CVE-2026-1492 is a significant security vulnerability affecting the User Registration & Membership Plugin for WordPress, which is widely utilized for user management and membership functionalities on WordPress sites. This plugin is designed to facilitate custom user registration forms, profile management, and content restriction based on user roles. The vulnerability arises from improper privilege management—specifically, the plugin allows users to define their own roles during the membership registration process without enforcing a strict server-side allowlist. As a result, this flaw enables unauthenticated attackers to potentially register accounts with elevated privileges, such as administrator-level access. Such unchecked privileges can lead to severe negative consequences for organizations, including unauthorized changes to site content, data exposure, and administrative access.

Potential impact of CVE-2026-1492

1. Unauthorized Access: Attackers can exploit this vulnerability to create administrator accounts, granting them full control over the affected WordPress sites. This unauthorized access can lead to manipulation of site content, user data, and overall site security.

2. Data Breach Risks: With administrative access, attackers could extract sensitive user information, leading to significant data breaches that compromise user privacy and violate regulations.

3. Widespread Site Compromise: The ability to register as an administrator not only endangers the specific instance of the WordPress site but can also pave the way for further exploitation of connected systems, including the installation of malicious software and propagation of broader attacks across networks.

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