CVE-2025-66140: Uper for Elementor Auth Bypass Flaw

CVE-2025-66140 Overview

CVE-2025-66140 is a Missing Authorization vulnerability affecting the Uper for Elementor WordPress plugin developed by merkulove. This broken access control flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized access to plugin functionality that should be restricted to authenticated users with appropriate privileges.

The vulnerability stems from a lack of proper authorization checks (CWE-862), which can allow unauthenticated or low-privileged users to perform actions intended only for administrators or other privileged roles. This is a common security weakness in WordPress plugins where capability checks are missing or improperly implemented.

Critical Impact

Attackers may exploit this broken access control vulnerability to bypass security restrictions and perform unauthorized actions within the WordPress site, potentially leading to site compromise or data manipulation.

Affected Products

• Uper for Elementor plugin versions through 1.0.5
• WordPress sites running vulnerable versions of uper-elementor

Discovery Timeline

• 2026-01-22 - CVE-2025-66140 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-66140

Vulnerability Analysis

This Missing Authorization vulnerability (CWE-862) occurs when the Uper for Elementor plugin fails to properly verify that a user has the required permissions before allowing access to certain functionality. In WordPress environments, this typically manifests when AJAX handlers, REST API endpoints, or administrative functions lack proper current_user_can() capability checks or nonce verification.

The vulnerability enables attackers to interact with protected plugin features without proper authentication or authorization. Depending on the specific functionality exposed, this could allow unauthorized modification of plugin settings, access to restricted content, or manipulation of Elementor-based page elements managed by the plugin.

Root Cause

The root cause is the absence of authorization checks in one or more plugin functions that handle user requests. WordPress plugins must implement proper capability checks to ensure that only users with appropriate roles can execute sensitive operations. When these checks are missing, any user—including unauthenticated visitors—may be able to trigger protected functionality by directly calling the affected endpoints or functions.

Attack Vector

An attacker can exploit this vulnerability by directly accessing the unprotected functionality without having the required permissions. The attack typically involves:

1. Identifying AJAX actions, REST API routes, or other entry points in the plugin that lack authorization checks
2. Crafting requests to these endpoints to bypass intended access restrictions
3. Executing unauthorized actions such as modifying plugin settings or accessing restricted data

The attack does not require authentication in many broken access control scenarios, making it exploitable by remote attackers with network access to the WordPress site.

For detailed technical information about this vulnerability, see the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-66140

Indicators of Compromise

• Unexpected modifications to Elementor page content or plugin settings without administrator action
• Unusual AJAX requests to admin-ajax.php targeting uper-elementor actions from unauthenticated sessions
• Access logs showing direct requests to plugin endpoints from unknown or suspicious IP addresses

Detection Strategies

• Monitor WordPress access logs for requests to uper-elementor related AJAX actions or REST API endpoints
• Review audit logs for configuration changes that were not initiated by authorized administrators
• Implement web application firewall (WAF) rules to detect and block unauthorized access attempts to plugin functionality

Monitoring Recommendations

• Enable comprehensive logging for WordPress admin actions and AJAX requests
• Deploy security plugins that track user activity and alert on suspicious authorization bypass attempts
• Regularly audit plugin configurations and content for unauthorized modifications

How to Mitigate CVE-2025-66140

Immediate Actions Required

• Update the Uper for Elementor plugin to a patched version as soon as one becomes available from the vendor
• Temporarily disable the Uper for Elementor plugin if it is not critical to site functionality while awaiting a patch
• Implement additional access controls at the web server or WAF level to restrict access to known vulnerable endpoints
• Review and audit any changes made to content or settings that may have been affected by exploitation

Patch Information

Check the official WordPress plugin repository and the vendor's website for an updated version of Uper for Elementor that addresses this broken access control vulnerability. The Patchstack advisory provides additional details and may be updated with patch information.

Workarounds

• Disable the Uper for Elementor plugin until a security patch is available
• Use a WordPress security plugin to add additional capability checks or block unauthorized AJAX requests
• Implement server-level access controls to restrict requests to admin-ajax.php from unauthenticated users when possible
• Consider using a web application firewall to filter malicious requests targeting the vulnerable plugin

# Example: Disable the plugin via WP-CLI until patched
wp plugin deactivate uper-elementor

# Verify the plugin is disabled
wp plugin status uper-elementor