CVE-2026-24373: RegistrationMagic Privilege Escalation

CVE-2026-24373 Overview

CVE-2026-24373 is an Incorrect Privilege Assignment vulnerability in the Metagauss RegistrationMagic WordPress plugin (custom-registration-form-builder-with-submission-manager). This vulnerability allows attackers to perform privilege escalation, potentially leading to account takeover. The flaw stems from improper privilege assignment mechanisms within the plugin's user registration and management functionality.

Critical Impact

This vulnerability enables attackers to escalate privileges within WordPress installations, potentially taking over user accounts including administrator accounts, leading to complete site compromise.

Affected Products

• Metagauss RegistrationMagic plugin versions through 6.0.7.1
• WordPress installations using the custom-registration-form-builder-with-submission-manager plugin
• All configurations of RegistrationMagic from initial release through version 6.0.7.1

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-24373 published to NVD
• 2026-03-25 - Last updated in NVD database

Technical Details for CVE-2026-24373

Vulnerability Analysis

This vulnerability is classified under CWE-266 (Incorrect Privilege Assignment), which occurs when a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In the context of the RegistrationMagic plugin, this manifests as a flaw in how user roles and capabilities are assigned during the registration or account management process.

The vulnerability affects WordPress sites using RegistrationMagic for custom registration forms. The plugin fails to properly validate or restrict privilege assignments, allowing malicious actors to manipulate the registration process to gain elevated privileges they should not possess.

Root Cause

The root cause is improper privilege assignment logic within the RegistrationMagic plugin. The plugin does not adequately verify or sanitize user-supplied input related to role assignments during account creation or modification. This allows attackers to inject or manipulate role parameters, bypassing the intended access control mechanisms and gaining unauthorized privileges on the WordPress installation.

Attack Vector

The attack exploits the flawed privilege assignment mechanism in the RegistrationMagic plugin. An attacker can leverage the custom registration form functionality to manipulate role-related parameters during the account creation or update process. By crafting malicious requests that include elevated role assignments, an attacker can escalate their privileges from a standard subscriber or unauthenticated user to administrator-level access.

The vulnerability allows for account takeover scenarios where attackers can potentially:

• Register new accounts with administrator privileges
• Modify existing account roles to gain elevated access
• Take over existing user accounts by manipulating the privilege assignment process

For detailed technical analysis, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-24373

Indicators of Compromise

• Unexpected user accounts with administrator or elevated privileges appearing in WordPress user lists
• Suspicious registration activity from unusual IP addresses or with malformed registration data
• Audit logs showing privilege changes that were not initiated by legitimate administrators
• Unusual activity patterns on accounts that recently registered through RegistrationMagic forms

Detection Strategies

• Monitor WordPress user creation and role assignment events for anomalous privilege escalations
• Implement web application firewall (WAF) rules to detect suspicious POST requests to registration endpoints
• Review server access logs for unusual patterns targeting RegistrationMagic plugin endpoints
• Deploy endpoint detection solutions to identify unauthorized administrative actions

Monitoring Recommendations

• Enable WordPress security logging to capture all user registration and role modification events
• Configure alerts for new administrator account creation or existing account privilege escalation
• Regularly audit the WordPress user database for unexpected role assignments
• Monitor plugin-related HTTP traffic for manipulation attempts targeting registration parameters

How to Mitigate CVE-2026-24373

Immediate Actions Required

• Update RegistrationMagic plugin to the latest patched version immediately
• Audit all existing user accounts for unauthorized privilege assignments
• Review recent registration activity for signs of exploitation
• Consider temporarily disabling registration forms until the patch is applied

Patch Information

Organizations using the RegistrationMagic WordPress plugin should update to a version newer than 6.0.7.1 that addresses this vulnerability. Check the WordPress plugin repository or the official Metagauss website for the latest security update. The Patchstack Vulnerability Report provides additional details on the vulnerability and recommended remediation steps.

Workarounds

• Temporarily disable the RegistrationMagic plugin until a patch can be applied
• Implement strict user role monitoring with immediate alerting on privilege changes
• Use a web application firewall to filter potentially malicious registration requests
• Restrict registration functionality to authenticated users only if public registration is not business-critical

# WordPress CLI commands to audit user roles
# List all administrators to verify no unauthorized accounts exist
wp user list --role=administrator --fields=ID,user_login,user_email,user_registered

# Review recent user registrations for suspicious activity
wp user list --orderby=user_registered --order=DESC --fields=ID,user_login,user_email,user_registered,roles | head -20

# Temporarily disable the vulnerable plugin
wp plugin deactivate custom-registration-form-builder-with-submission-manager