CVE-2025-4103: WP-GeoMeta Privilege Escalation Flaw

CVE-2025-4103 Overview

CVE-2025-4103 is a privilege escalation vulnerability in the WP-GeoMeta plugin for WordPress, affecting versions 0.3.4 through 0.3.5. The flaw resides in the wp_ajax_wpgm_start_geojson_import() function, which lacks a capability check. Authenticated attackers with Subscriber-level access or higher can invoke this AJAX endpoint to elevate their privileges to administrator. The issue is classified under [CWE-285] (Improper Authorization). Successful exploitation grants attackers full administrative control of the affected WordPress site.

Critical Impact
A low-privileged WordPress user can escalate to administrator, leading to full site takeover, arbitrary content modification, and persistent backdoor installation.

Affected Products

WP-GeoMeta plugin for WordPress version 0.3.4
WP-GeoMeta plugin for WordPress version 0.3.5
WordPress sites with WP-GeoMeta installed and active

Discovery Timeline

2025-05-31 - CVE-2025-4103 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-4103

Vulnerability Analysis

The WP-GeoMeta plugin registers an AJAX action handler named wp_ajax_wpgm_start_geojson_import() to support GeoJSON import workflows from the plugin dashboard. WordPress AJAX handlers registered through the wp_ajax_ prefix are accessible to any authenticated user, including users with the Subscriber role. The handler does not call current_user_can() or any equivalent capability check before processing the request. As a result, the import routine executes with the privileges available to administrative workflows, regardless of the calling user's role.

An attacker who registers a Subscriber account on a site running the affected plugin can call the AJAX endpoint to perform actions that ultimately modify privileged data, leading to administrator-level access. The attack requires only network reachability to the WordPress AJAX endpoint and a valid low-privileged session.

Root Cause

The root cause is a missing authorization check in the AJAX handler. The plugin assumed the endpoint would be invoked only from authorized contexts but did not enforce role or capability validation on the server side. This is a [CWE-285] Improper Authorization weakness. The plugin source file referenced in the WordPress Plugin Source Code shows the registration of the affected function.

Attack Vector

The attack vector is network-based and requires authentication at the Subscriber level, which is trivially obtainable on sites with open registration. An attacker authenticates to the target WordPress site, then issues a POST request to /wp-admin/admin-ajax.php with the action parameter set to wpgm_start_geojson_import. Because the handler skips capability validation, the request is processed and the attacker leverages the resulting state to gain administrator privileges. No user interaction is required from a site administrator. Refer to the Wordfence Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-4103

Indicators of Compromise

POST requests to /wp-admin/admin-ajax.php containing the action=wpgm_start_geojson_import parameter originating from non-administrator sessions.
New or unexpected WordPress administrator accounts appearing in wp_users and wp_usermeta tables.
Modifications to plugin or theme files, or unscheduled installation of new plugins, following Subscriber account activity.
Newly registered Subscriber accounts followed shortly by privilege changes in audit logs.

Detection Strategies

Review WordPress access logs for admin-ajax.php calls referencing wpgm_start_geojson_import from user sessions lacking administrative roles.
Audit the wp_usermeta table for unexpected changes to the wp_capabilities meta key.
Deploy a web application firewall rule that inspects AJAX action parameters against authenticated user roles.
Correlate user role changes with the source IP and session of the requesting account.

Monitoring Recommendations

Enable verbose WordPress audit logging that records role and capability changes with timestamps and originating user IDs.
Monitor the WP-GeoMeta plugin version across all managed WordPress sites and flag any instance running 0.3.4 or 0.3.5.
Alert on Subscriber accounts that perform any administrative AJAX action within minutes of registration.

How to Mitigate CVE-2025-4103

Immediate Actions Required

Update the WP-GeoMeta plugin to a version newer than 0.3.5 as soon as a patched release is available from the WordPress Plugin Developer Page.
Deactivate and remove the WP-GeoMeta plugin on any site running versions 0.3.4 or 0.3.5 if an updated release is not yet installed.
Audit all administrator accounts and remove any that cannot be attributed to legitimate users.
Disable open user registration or restrict the default new user role to limit Subscriber-level account creation.

Patch Information

No fixed version is identified in the NVD record at the time of publication. Site operators should consult the WordPress Plugin Developer Page for the latest plugin release and changelog. Until a fixed version is confirmed, deactivating the plugin is the most reliable mitigation.

Workarounds

Restrict access to /wp-admin/admin-ajax.php requests with the wpgm_start_geojson_import action using a web application firewall rule that requires administrator authentication.
Set the WordPress default_role option to a custom role with no AJAX privileges, or disable self-registration via the General Settings.
Force password resets for all existing Subscriber accounts to invalidate any sessions that may have been used to stage exploitation.

bash

# Example WordPress configuration to disable open registration
wp option update users_can_register 0
wp option update default_role subscriber

# Deactivate the vulnerable plugin until patched
wp plugin deactivate wp-geometa