CVE-2026-40763: Royal Elementor Addons Auth Bypass Flaw

CVE-2026-40763 Overview

A Missing Authorization vulnerability has been identified in WP Royal's Royal Elementor Addons plugin for WordPress. This broken access control flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within the affected WordPress installations.

Critical Impact

Unauthenticated attackers can bypass access controls and perform unauthorized modifications on affected WordPress sites running vulnerable versions of Royal Elementor Addons.

Affected Products

• Royal Elementor Addons plugin versions through 1.7.1056
• WordPress installations using the affected plugin versions

Discovery Timeline

• April 15, 2026 - CVE-2026-40763 published to NVD
• April 16, 2026 - Last updated in NVD database

Technical Details for CVE-2026-40763

Vulnerability Analysis

This vulnerability stems from CWE-862 (Missing Authorization), a critical security flaw where the application fails to perform authorization checks before allowing access to sensitive functionality or resources. In the context of Royal Elementor Addons, certain plugin endpoints or AJAX actions lack proper capability checks, allowing unauthenticated or low-privileged users to access functionality that should be restricted to administrators or editors.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any user interaction. While the integrity impact allows for unauthorized modifications, confidentiality and availability remain unaffected according to the vulnerability assessment.

Root Cause

The root cause of CVE-2026-40763 is the absence of proper authorization checks in the Royal Elementor Addons plugin. WordPress plugins typically use functions like current_user_can() to verify user capabilities before executing privileged operations. When these checks are missing or improperly implemented, attackers can directly invoke AJAX handlers or REST API endpoints to perform unauthorized actions.

Attack Vector

The vulnerability can be exploited over the network by sending crafted requests to vulnerable plugin endpoints. Since no authentication is required (PR:N in the CVSS vector) and no user interaction is needed (UI:N), the attack complexity is considered low. An attacker could potentially:

1. Discover exposed AJAX actions or REST endpoints in the plugin
2. Craft HTTP requests targeting these endpoints directly
3. Bypass intended access restrictions to modify plugin settings or content

The vulnerability is accessible via standard HTTP requests to WordPress AJAX handlers (/wp-admin/admin-ajax.php) or the REST API, making it exploitable by any remote attacker with network access to the target site.

Detection Methods for CVE-2026-40763

Indicators of Compromise

• Unexpected modifications to Elementor widget configurations or page layouts
• Unusual AJAX requests to admin-ajax.php with Royal Elementor Addons action handlers
• Web server logs showing unauthenticated POST requests to plugin endpoints
• Modifications to plugin settings without corresponding admin user activity

Detection Strategies

• Monitor WordPress AJAX requests for calls to Royal Elementor Addons action handlers from unauthenticated sessions
• Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting known vulnerable endpoints
• Review access logs for patterns of requests to admin-ajax.php with action parameters related to the Royal Elementor Addons plugin
• Deploy file integrity monitoring to detect unauthorized changes to plugin files or WordPress content

Monitoring Recommendations

• Enable comprehensive logging of all AJAX and REST API requests in WordPress
• Configure alerts for authentication bypass attempts targeting plugin functionality
• Implement real-time monitoring for configuration changes in the Royal Elementor Addons plugin
• Review WordPress audit logs regularly for anomalous activity patterns

How to Mitigate CVE-2026-40763

Immediate Actions Required

• Update Royal Elementor Addons to a version newer than 1.7.1056 that contains the security fix
• Audit recent site changes for any unauthorized modifications
• Review WordPress user accounts for any suspicious additions or privilege escalations
• Consider temporarily disabling the plugin until the update can be applied

Patch Information

This vulnerability affects Royal Elementor Addons versions through 1.7.1056. Users should update to the latest available version that addresses this missing authorization issue. For detailed patch information, refer to the Patchstack Vulnerability Report.

Workarounds

• Implement a Web Application Firewall (WAF) with rules to block unauthorized access to plugin AJAX handlers
• Restrict access to /wp-admin/admin-ajax.php for unauthenticated users where feasible (may impact legitimate plugin functionality)
• Use WordPress security plugins to add additional capability checks and access controls
• Consider using .htaccess rules or server-level controls to limit access to administrative endpoints

# Example .htaccess rule to add additional restrictions
# Note: Test thoroughly as this may affect legitimate functionality
<Files "admin-ajax.php">
    # Allow authenticated requests and specific safe actions
    # Block suspicious requests to vulnerable endpoints
    Order Allow,Deny
    Allow from all
</Files>