CVE-2025-14866: 
WordPress vulnerability analysis and mitigation

CVE-2025-14866 is a privilege escalation vulnerability in the Melapress Role Editor plugin for WordPress, affecting all versions up to and including 1.1.1. The flaw stems from a misconfigured capability check on the save_secondary_roles_field function, allowing authenticated attackers with Subscriber-level access or higher to assign themselves additional roles, including Administrator. It was published on January 23, 2026, and carries a CVSS v3.1 base score of 8.8 (High) (Wordfence, Red Hat CVE).

The root cause is classified as CWE-863 (Incorrect Authorization): the save_secondary_roles_field function in the plugin's user profile admin class fails to properly verify that the requesting user has sufficient privileges before processing role assignment requests (Wordfence). The vulnerable code is visible in the plugin's source at classes/admin/additional-form-fields/class-user-profile.php (line 103) and classes/admin/ajax/class-admin-ajax.php. Exploitation requires only a low-privileged authenticated account (Subscriber or above), no user interaction, and is conducted over the network with low attack complexity. A patch was committed in changeset 3439348 on the WordPress plugin repository (WordPress Trac).

Successful exploitation allows an authenticated attacker with minimal privileges (Subscriber-level) to escalate to Administrator, effectively granting full control over the WordPress installation. This can result in complete confidentiality breaches (access to all site data and user information), integrity compromise (content modification, backdoor installation, plugin/theme manipulation), and availability disruption (site defacement or takedown) (Wordfence, Red Hat CVE).

There is no public proof-of-concept exploit and no evidence of in-the-wild exploitation at this time (Wordfence). The vulnerability has been detected by Qualys (detection ID 530885) and carries an EPSS score of approximately 0.017% (0.000170), indicating a currently low probability of exploitation in the near term. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported.

1. Reconnaissance: Identify WordPress sites running the Melapress Role Editor plugin version 1.1.1 or earlier. This can be done by checking the plugin's readme.txt or changelog exposed at wp-content/plugins/melapress-role-editor/readme.txt.
2. Obtain low-privileged access: Register or obtain credentials for a Subscriber-level (or higher) account on the target WordPress site.
3. Craft malicious request: Authenticate to the WordPress site and send a crafted POST request to the admin AJAX endpoint (/wp-admin/admin-ajax.php) or the user profile save action, targeting the save_secondary_roles_field function with a payload that includes the administrator role in the secondary roles field.
4. Escalate privileges: Because the capability check is misconfigured, the server processes the request and assigns the Administrator role to the attacker's account without proper authorization validation.
5. Achieve full site control: Log in or refresh the session to confirm Administrator access, then leverage full WordPress admin capabilities for data exfiltration, backdoor installation, or further compromise (Wordfence, WordPress Trac).

• Logs: WordPress access logs showing POST requests to /wp-admin/admin-ajax.php or user profile update endpoints from low-privileged user accounts, particularly with role-related parameters; unexpected role change entries in the WordPress wp_usermeta table for Subscriber-level users.
• Database: Entries in wp_usermeta where meta_key = 'wp_capabilities' for Subscriber accounts suddenly include administrator capability.
• File System: New or modified plugin/theme files, unexpected admin user accounts created, or new backdoor scripts (e.g., PHP web shells) placed in the WordPress directory after a role escalation event.
• Process/Behavior: Unusual administrative actions (plugin installation, user creation, settings changes) performed by accounts that were previously Subscriber-level.

Update the Melapress Role Editor plugin to a version beyond 1.1.1, which includes the fix committed in changeset 3439348 on the WordPress plugin repository (WordPress Trac). If an immediate update is not possible, consider temporarily deactivating the plugin to eliminate the attack surface. Site administrators should also audit existing user roles and capabilities in the wp_usermeta table to detect any unauthorized privilege escalations that may have already occurred. Restrict plugin installation and management to trusted administrators and monitor for suspicious role assignment activity (Wordfence).

Wordfence included CVE-2025-14866 in its weekly WordPress vulnerability report for January 19–25, 2026, flagging it as a notable privilege escalation issue (Wordfence Blog). The vulnerability was also picked up by automated security feeds including RedPacket Security and The Hacker Wire, and noted by INCIBE-CERT in Spain. Social media activity was limited to automated CVE broadcast accounts on Mastodon and Bluesky. No significant researcher commentary or vendor statements beyond the patch commit have been observed.