CVE-2025-14866: WordPress Role Editor Privilege Escalation

CVE-2025-14866 Overview

The Melapress Role Editor plugin for WordPress contains a critical Privilege Escalation vulnerability affecting all versions up to and including 1.1.1. The vulnerability stems from a misconfigured capability check on the save_secondary_roles_field function, which allows authenticated attackers with minimal privileges (Subscriber-level access and above) to assign themselves additional roles, including Administrator.

Critical Impact

Authenticated attackers with low-privilege accounts can escalate their privileges to Administrator level, potentially gaining full control over the affected WordPress installation.

Affected Products

• Melapress Role Editor plugin for WordPress versions ≤ 1.1.1
• WordPress installations with Melapress Role Editor installed
• Any WordPress site allowing user registration with vulnerable plugin versions

Discovery Timeline

• 2026-01-23 - CVE CVE-2025-14866 published to NVD
• 2026-01-26 - Last updated in NVD database

Technical Details for CVE-2025-14866

Vulnerability Analysis

This vulnerability is classified as CWE-863 (Incorrect Authorization), representing a failure to properly verify that a user has the necessary permissions before allowing a sensitive operation. The affected function save_secondary_roles_field fails to adequately validate the requesting user's authorization level before processing role assignment requests.

The vulnerability allows any authenticated user—even those with the lowest privilege level (Subscriber)—to modify their own user profile and assign themselves additional WordPress roles. Since the Administrator role can be self-assigned through this flaw, attackers can achieve complete compromise of the WordPress installation.

The attack is network-accessible and requires low complexity to exploit. An attacker needs only basic authentication (a Subscriber account) and no user interaction is required to successfully exploit this vulnerability. The impact spans confidentiality, integrity, and availability, as an attacker with Administrator privileges gains full control over the WordPress site.

Root Cause

The root cause lies in the save_secondary_roles_field function within the class-user-profile.php file. This function processes secondary role assignments but fails to implement proper capability checks to verify that the requesting user has authorization to modify role assignments. The misconfigured capability check allows users to bypass the intended access control restrictions and modify their own roles without proper authorization.

Attack Vector

An authenticated attacker exploits this vulnerability through the following attack flow:

1. The attacker creates or obtains access to a low-privilege WordPress account (Subscriber level is sufficient)
2. The attacker navigates to the user profile editing functionality
3. The attacker crafts a request to the save_secondary_roles_field function
4. Due to the improper capability check, the function processes the role assignment request
5. The attacker assigns themselves the Administrator role
6. The attacker now has full administrative access to the WordPress installation

The vulnerability exists in the user profile handling classes, specifically in how the plugin processes AJAX requests for secondary role management. Technical details can be found in the WordPress Plugin Class File and the WordPress Plugin Admin Ajax Class.

Detection Methods for CVE-2025-14866

Indicators of Compromise

• Unexpected role changes in WordPress user accounts, particularly Subscriber accounts gaining Administrator privileges
• Unusual activity in the wp_usermeta table related to role modifications
• AJAX requests to the Melapress Role Editor plugin's admin-ajax handlers from low-privilege users
• New Administrator accounts appearing without legitimate creation workflows

Detection Strategies

• Monitor WordPress audit logs for role modification events, especially escalations from Subscriber to Administrator
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized role assignment requests
• Review server access logs for suspicious POST requests targeting the plugin's AJAX endpoints
• Deploy endpoint detection to identify unauthorized privilege changes in real-time

Monitoring Recommendations

• Enable comprehensive WordPress activity logging with a security plugin
• Configure alerts for any role assignment changes, particularly to administrative roles
• Regularly audit user accounts and their assigned roles for unauthorized changes
• Monitor for anomalous authentication patterns following role modifications

How to Mitigate CVE-2025-14866

Immediate Actions Required

• Update Melapress Role Editor to the patched version immediately
• Audit all existing WordPress user accounts for unauthorized role assignments
• Review user activity logs for signs of exploitation
• Consider temporarily disabling user registration if immediate patching is not possible

Patch Information

The vulnerability has been addressed in the latest version of the Melapress Role Editor plugin. The fix is documented in WordPress Changeset 3439348. Administrators should update to the patched version through the WordPress plugin update mechanism or by downloading the latest release directly from the WordPress plugin repository.

For detailed vulnerability information, refer to the Wordfence Vulnerability Report.

Workarounds

• Disable the Melapress Role Editor plugin until the patch can be applied
• Restrict user registration to prevent attackers from creating Subscriber accounts
• Implement additional access controls through WordPress security plugins or .htaccess rules to block unauthorized AJAX requests
• Use a Web Application Firewall to filter suspicious role modification requests

# Temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate melapress-role-editor

# Audit current user roles for anomalies
wp user list --fields=ID,user_login,roles

# After patching, re-enable the plugin
wp plugin activate melapress-role-editor