CVE-2024-30467: Essential Blocks Auth Bypass Vulnerability

CVE-2024-30467 Overview

CVE-2024-30467 is a Missing Authorization vulnerability [CWE-862] affecting the WPDeveloper Essential Blocks for Gutenberg plugin for WordPress. The flaw affects all versions up to and including 4.4.9. An authenticated attacker with low privileges can invoke plugin functionality that lacks proper capability checks, leading to broken access control. Successful exploitation can compromise the confidentiality, integrity, and availability of the affected WordPress site.

Critical Impact
An authenticated low-privilege user can bypass authorization controls in Essential Blocks for Gutenberg through version 4.4.9, enabling unauthorized actions across the WordPress installation.

Affected Products

WPDeveloper Essential Blocks for Gutenberg (free, WordPress)
All versions from n/a through 4.4.9
WordPress sites using the plugin in default configuration

Discovery Timeline

2024-06-09 - CVE-2024-30467 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-30467

Vulnerability Analysis

The vulnerability arises from missing authorization checks within the Essential Blocks for Gutenberg plugin. The plugin exposes functionality that does not validate whether the requesting user holds the required WordPress capability. As a result, authenticated users with low-privilege roles can invoke actions reserved for higher-privileged accounts.

Broken access control at the plugin layer bypasses WordPress role and capability enforcement. The attack requires network access to the WordPress site and low-privilege authentication, with no user interaction. Once triggered, the missing authorization can affect data confidentiality, integrity, and site availability.

Root Cause

The root cause is the absence of current_user_can() capability checks and nonce validation on sensitive plugin endpoints. The plugin registers actions or REST routes without enforcing role-based authorization. This aligns with [CWE-862: Missing Authorization], where the software does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack Vector

Exploitation occurs over the network against the WordPress site. The attacker must possess a valid authenticated session with at least a low-privilege role such as Subscriber or Contributor. The attacker sends crafted HTTP requests to the vulnerable plugin endpoints, invoking privileged functionality without the required capability. The vulnerability is described in the Patchstack Vulnerability Report.

No public proof-of-concept exploit is available at this time, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2024-30467

Indicators of Compromise

Unexpected HTTP POST or REST API requests to Essential Blocks endpoints from low-privilege authenticated users
Modifications to WordPress content, options, or blocks not attributable to administrative accounts
New or altered posts, pages, or plugin settings created by Subscriber or Contributor accounts
Presence of Essential Blocks for Gutenberg versions at or below 4.4.9

Detection Strategies

Inventory WordPress installations and identify sites running Essential Blocks for Gutenberg through version 4.4.9
Review web server access logs for anomalous requests to plugin-specific admin-ajax.php actions or REST routes
Correlate WordPress audit logs with authenticated session activity from low-privilege accounts
Compare current plugin file hashes against known-good release artifacts

Monitoring Recommendations

Enable WordPress activity logging to capture role-based action attempts and privilege changes
Alert on repeated 4xx or 2xx responses to plugin endpoints from non-administrator users
Monitor for unauthorized changes to wp_options, user roles, and block content stores
Ingest WordPress and web server telemetry into a centralized SIEM for correlation

How to Mitigate CVE-2024-30467

Immediate Actions Required

Update Essential Blocks for Gutenberg to a version later than 4.4.9 as published by WPDeveloper
Audit all WordPress user accounts and remove or downgrade unnecessary low-privilege accounts
Review recent site changes for unauthorized modifications made through the vulnerable plugin
Rotate credentials for any accounts suspected of compromise

Patch Information

WPDeveloper addressed the broken access control issue in versions released after 4.4.9. Administrators should upgrade through the WordPress plugin dashboard or by replacing the plugin directory with the latest release. Refer to the Patchstack Vulnerability Report for advisory details.

Workarounds

Disable the Essential Blocks for Gutenberg plugin until the patched version is deployed
Restrict user registration and require administrative approval for new accounts
Deploy a web application firewall (WAF) rule to block requests to vulnerable plugin endpoints from non-administrator sessions
Enforce least privilege by limiting Subscriber and Contributor roles where feasible

bash

# Configuration example: identify vulnerable installations via WP-CLI
wp plugin get essential-blocks --field=version
wp plugin update essential-blocks
# Temporary mitigation until patched version is deployed
wp plugin deactivate essential-blocks