CVE-2025-12665 Overview
The Ninja Countdown | Fastest Countdown Builder plugin for WordPress contains a missing authorization vulnerability in the ninja_countdown_admin_ajax AJAX endpoint. All versions up to and including 1.5.0 fail to enforce a capability check on this endpoint. Authenticated users with Subscriber-level access or higher can invoke the endpoint to delete arbitrary countdowns stored by the plugin. The flaw is categorized under CWE-862: Missing Authorization.
Critical Impact
Any authenticated WordPress user with at least Subscriber privileges can delete countdown records created by administrators, resulting in unauthorized data loss on affected sites.
Affected Products
- Ninja Countdown | Fastest Countdown Builder plugin for WordPress
- All versions up to and including 1.5.0
- WordPress sites permitting Subscriber-level or higher registration
Discovery Timeline
- 2025-11-11 - CVE-2025-12665 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-12665
Vulnerability Analysis
The plugin registers an AJAX action handler named ninja_countdown_admin_ajax that services administrative operations, including countdown deletion. The handler does not verify the requesting user's WordPress capabilities before executing state-changing operations. Any authenticated session, including users registered at the Subscriber role, can issue a valid request to this endpoint.
The attack requires network access to the WordPress site and an authenticated session with low privileges. No user interaction beyond the attacker's own request is required. Successful exploitation results in the removal of countdown records, affecting integrity of the plugin's stored content. Confidentiality and availability of the broader system are not directly impacted.
Root Cause
WordPress AJAX endpoints registered via wp_ajax_{action} hooks are accessible to any authenticated user by default. Developers must explicitly enforce capability checks using current_user_can() and validate nonces via check_ajax_referer(). In Ninja Countdown versions through 1.5.0, the deletion path within ninja_countdown_admin_ajax omits both a capability gate and an effective nonce validation for privilege enforcement.
Attack Vector
An attacker registers or acquires a low-privileged account on the target WordPress site. The attacker then sends an authenticated HTTP POST request to /wp-admin/admin-ajax.php with the action parameter set to ninja_countdown_admin_ajax and parameters identifying the countdown to delete. Because the handler skips the capability check, the plugin processes the deletion as if it originated from an administrator. Repeated requests can enumerate and remove every countdown configured by site administrators.
No verified proof-of-concept code is publicly available. See the Wordfence vulnerability analysis for additional technical context.
Detection Methods for CVE-2025-12665
Indicators of Compromise
- Unexpected disappearance of configured countdowns in the Ninja Countdown admin interface.
- POST requests to /wp-admin/admin-ajax.php containing action=ninja_countdown_admin_ajax originating from non-administrator sessions.
- Newly registered Subscriber accounts that immediately generate authenticated admin-ajax traffic.
Detection Strategies
- Enable WordPress audit logging plugins to record AJAX invocations, authenticated user IDs, and their assigned roles for the ninja_countdown_admin_ajax action.
- Correlate web server access logs against WordPress user role assignments to identify low-privileged users invoking admin-scoped endpoints.
- Alert on any user with role subscriber or contributor posting to admin-ajax.php with plugin administrative actions.
Monitoring Recommendations
- Monitor the WordPress wp_options and plugin-specific tables for unexpected row deletions.
- Track authentication events and new account registrations, especially where open registration is enabled.
- Baseline typical admin-ajax traffic volumes and alert on deviations tied to plugin-specific actions.
How to Mitigate CVE-2025-12665
Immediate Actions Required
- Update the Ninja Countdown plugin to a version released after 1.5.0 that includes the capability check fix, once available from the vendor.
- Restrict WordPress user registration to trusted parties and disable open Subscriber sign-up if not required.
- Audit existing user accounts and remove unused Subscriber-level accounts.
Patch Information
All versions through 1.5.0 are vulnerable. Consult the WordPress plugin page for the latest release and changelog entries addressing the missing capability check. Apply the patched version across all environments and validate that the ninja_countdown_admin_ajax handler enforces current_user_can() and a valid nonce.
Workarounds
- Deactivate and remove the Ninja Countdown plugin until a patched release is applied.
- Deploy a web application firewall rule that blocks requests to admin-ajax.php with action=ninja_countdown_admin_ajax from users below Editor role.
- Back up the WordPress database on a regular schedule so deleted countdown records can be restored quickly.
# Configuration example: block low-privileged access via .htaccess-based rule (illustrative)
# Requires an auth-aware WAF or plugin; native .htaccess cannot inspect WP sessions.
# Preferred approach: apply the vendor patch and restrict registration in wp-admin.
wp plugin deactivate ninja-countdown
wp option update users_can_register 0
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
