CVE-2026-3132: Master Addons for Elementor RCE Vulnerability

CVE-2026-3132 Overview

The Master Addons for Elementor Premium plugin for WordPress contains a Remote Code Execution (RCE) vulnerability in all versions up to and including 2.1.3. The vulnerability exists in the JLTMA_Widget_Admin::render_preview method due to a missing capability check, allowing authenticated attackers with Subscriber-level access and above to execute arbitrary code on the server.

Critical Impact

Authenticated attackers with minimal privileges (Subscriber-level) can achieve full remote code execution on affected WordPress installations, potentially leading to complete server compromise.

Affected Products

• Master Addons for Elementor Premium plugin for WordPress versions up to and including 2.1.3
• WordPress installations using the vulnerable plugin versions
• Any web servers hosting affected WordPress sites

Discovery Timeline

• 2026-03-02 - CVE-2026-3132 published to NVD
• 2026-03-02 - Last updated in NVD database

Technical Details for CVE-2026-3132

Vulnerability Analysis

This vulnerability is classified as CWE-94 (Improper Control of Generation of Code, also known as Code Injection). The flaw stems from the JLTMA_Widget_Admin::render_preview method in the widget builder component of the Master Addons for Elementor Premium plugin.

The vulnerability allows authenticated users with minimal privileges (Subscriber-level access) to bypass authorization controls and execute arbitrary code on the server. This represents a significant security risk as WordPress Subscriber accounts are typically considered low-privilege accounts with minimal trusted access.

The attack is network-accessible and requires no user interaction, meaning an attacker with valid Subscriber credentials can exploit this vulnerability directly through HTTP requests. Successful exploitation grants the attacker the ability to read sensitive data, modify content, and potentially disrupt the availability of the WordPress installation.

Root Cause

The root cause of this vulnerability is a missing capability check in the render_preview method within the class-jltma-widget-admin.php file. WordPress uses capability checks to verify that a user has the appropriate permissions before allowing them to perform sensitive actions. Without this check, the function fails to validate whether the authenticated user has the necessary privileges to execute the preview rendering functionality, which inadvertently exposes code execution capabilities.

The vulnerable code is located at line 1127 of the WordPress Widget Class File.

Attack Vector

The attack vector is network-based and requires authentication with at least Subscriber-level access. An attacker would:

1. Obtain or create a WordPress account with Subscriber privileges on the target site
2. Craft a malicious request targeting the render_preview functionality
3. Send the request to the vulnerable endpoint without the expected capability verification
4. Achieve code execution on the server with the privileges of the web server process

The vulnerability mechanism allows attackers to inject and execute code through the preview rendering function. For detailed technical information about the specific implementation flaw, refer to the Wordfence Vulnerability Advisory.

Detection Methods for CVE-2026-3132

Indicators of Compromise

• Unusual HTTP POST requests to WordPress admin-ajax endpoints from Subscriber-level user accounts
• Unexpected process spawns or file system modifications originating from the web server process
• Log entries showing access to the render_preview functionality by low-privilege users
• Presence of suspicious files or web shells in WordPress directories

Detection Strategies

• Monitor WordPress authentication logs for Subscriber accounts making administrative API calls
• Implement web application firewall (WAF) rules to detect code injection patterns in requests to the plugin's endpoints
• Review access logs for requests to /wp-admin/admin-ajax.php with actions related to the Master Addons widget builder
• Deploy endpoint detection solutions like SentinelOne to identify malicious code execution attempts

Monitoring Recommendations

• Enable verbose logging for WordPress admin-ajax requests and review regularly
• Set up alerts for any code execution attempts originating from the web server process
• Monitor file integrity on WordPress installations to detect unauthorized modifications
• Implement network monitoring to detect suspicious outbound connections from web servers

How to Mitigate CVE-2026-3132

Immediate Actions Required

• Update the Master Addons for Elementor Premium plugin to a version newer than 2.1.3 immediately
• Audit WordPress user accounts and remove unnecessary Subscriber-level access
• Review server logs for signs of exploitation prior to patching
• Consider temporarily disabling the plugin if an update is not immediately available

Patch Information

The vulnerability has been addressed in the plugin update. The fix can be reviewed in the WordPress Changeset Update, which adds the necessary capability check to the render_preview method. Site administrators should update to the latest version of the plugin through the WordPress plugin repository.

Workarounds

• Restrict Subscriber account creation and review existing Subscriber accounts for necessity
• Implement additional authentication layers for WordPress admin functionality
• Use a Web Application Firewall (WAF) to filter potentially malicious requests to the vulnerable endpoint
• Consider disabling the widget builder feature if not required for site functionality

# Configuration example
# Temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate master-addons --path=/var/www/html/wordpress

# Verify current plugin version
wp plugin get master-addons --path=/var/www/html/wordpress --fields=version

# Update to the latest patched version
wp plugin update master-addons --path=/var/www/html/wordpress