CVE-2025-39493 Overview
CVE-2025-39493 is a missing authorization vulnerability in the ValvePress Rankie WordPress plugin. The flaw affects all versions up to and including 1.8.2 and results from incorrectly configured access control security levels [CWE-862]. Authenticated attackers with low privileges can invoke plugin functionality that should be restricted, leading to unauthorized changes to plugin data and configuration. The Rankie plugin tracks keyword rankings on WordPress sites, so exploitation can expose site analytics data and enable tampering with tracked keyword information.
Critical Impact
Authenticated users with minimal privileges can bypass access controls and execute restricted plugin actions, impacting confidentiality, integrity, and availability of Rankie plugin data.
Affected Products
- ValvePress Rankie WordPress plugin versions up to and including 1.8.2
- WordPress installations running the valvepress-rankie plugin
- Sites using Rankie for keyword rank tracking and SEO reporting
Discovery Timeline
- 2025-05-16 - CVE-2025-39493 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-39493
Vulnerability Analysis
The vulnerability stems from missing authorization checks in the Rankie plugin's request handlers. The plugin exposes actions accessible to authenticated WordPress users but does not verify that the caller has the required capability or role. Any user session, including low-privilege subscriber accounts, can trigger these actions. The attack vector is network-based and requires no user interaction, making exploitation straightforward on sites permitting user registration.
Because the flaw impacts confidentiality, integrity, and availability, an attacker can read protected plugin data, modify stored keyword tracking records, and disrupt plugin operation. WordPress sites that allow open registration are at higher risk because attackers can self-provision the authenticated context needed to invoke the vulnerable endpoints.
Root Cause
The root cause is broken access control [CWE-862]. Handler functions in the plugin lack capability checks such as current_user_can() and do not validate nonces before performing privileged operations. This design fails to enforce authorization boundaries between administrative and non-administrative WordPress roles.
Attack Vector
An authenticated attacker sends crafted HTTP requests to the WordPress admin-ajax.php endpoint or a similar plugin route registered by Rankie. The request targets action names exposed by the plugin. Because authorization is not enforced server-side, the plugin processes the request as if it came from a privileged user. See the Patchstack Vulnerability Advisory for reference details on the affected endpoints.
Detection Methods for CVE-2025-39493
Indicators of Compromise
- Unexpected POST requests to wp-admin/admin-ajax.php containing Rankie-specific action parameters from low-privilege user sessions
- Modification of Rankie plugin options in the wp_options table without a corresponding administrator session
- New or altered keyword tracking entries in Rankie database tables outside of administrator activity windows
Detection Strategies
- Review WordPress access logs for authenticated requests to Rankie plugin endpoints originating from non-administrator accounts
- Enable WordPress audit logging to capture plugin option changes and correlate them with the initiating user role
- Compare current plugin configuration and database records against known-good backups to identify unauthorized modifications
Monitoring Recommendations
- Alert on admin-ajax.php traffic where the referring user role is subscriber or contributor but the action targets plugin management functions
- Monitor for spikes in registration activity followed by requests to plugin AJAX handlers
- Track integrity of wp_options rows related to the Rankie plugin using file and database integrity monitoring
How to Mitigate CVE-2025-39493
Immediate Actions Required
- Update the Rankie plugin to a version later than 1.8.2 once the vendor releases a patched build
- Disable and remove the Rankie plugin from any WordPress site where an updated version is not yet available
- Audit existing WordPress user accounts and remove unused or untrusted low-privilege accounts
Patch Information
As of the last NVD modification date 2026-06-17, the advisory lists the affected range as versions up to and including 1.8.2. Administrators should consult the Patchstack Vulnerability Advisory for the latest fixed version guidance and apply the update through the WordPress plugin dashboard.
Workarounds
- Restrict WordPress user registration and require administrator approval for new accounts
- Use a web application firewall to block requests to Rankie plugin actions from non-administrator sessions
- Enforce least privilege on all WordPress roles and remove capabilities from subscribers that are not required for site function
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
