CVE-2026-2306 Overview
CVE-2026-2306 is a missing authorization vulnerability in the Ninja Tables – Easy Data Table Builder plugin for WordPress. The flaw affects all versions up to and including 5.2.6. The plugin fails to perform capability checks on the createFluentCartTable function within the FluentCart module. Authenticated users with Subscriber-level access or above can invoke this function to create arbitrary Ninja Tables in the database. The issue is classified as [CWE-862] Missing Authorization. Successful exploitation leads to database pollution and resource exhaustion on affected WordPress sites.
Critical Impact
Authenticated Subscriber-level attackers can create unlimited database tables, leading to database pollution and resource exhaustion that degrades WordPress site performance and storage.
Affected Products
- Ninja Tables – Easy Data Table Builder plugin for WordPress (all versions ≤ 5.2.6)
- WordPress installations with the FluentCart integration module enabled
- Sites permitting Subscriber-level user registration with the plugin active
Discovery Timeline
- 2026-05-06 - CVE-2026-2306 published to NVD
- 2026-05-06 - Last updated in NVD database
Technical Details for CVE-2026-2306
Vulnerability Analysis
The vulnerability resides in the FluentCart module of the Ninja Tables plugin. The createFluentCartTable function in FluentCartModule.php and the corresponding handler in FluentCartHandler.php lack capability checks. Any authenticated user can trigger the AJAX endpoint that maps to this handler. The function then proceeds to create database tables without verifying that the caller has administrative or editor privileges.
The practical impact centers on integrity and availability. Attackers cannot read existing data, but they can write new table entries that bloat the WordPress database. Repeated invocation produces resource exhaustion conditions on shared hosting environments. The flaw requires a valid authenticated session, so unauthenticated exploitation is not possible.
Root Cause
The root cause is the absence of a current_user_can() permission check before the table creation logic executes. WordPress plugins must validate user capabilities on any action that modifies persistent state. The FluentCart handler relies on nonce verification alone, which any authenticated user can satisfy. The fix introduced in the post-5.2.6 changeset adds the missing capability gate.
Attack Vector
Exploitation requires a Subscriber-level account or higher on a target WordPress site. The attacker authenticates, retrieves a valid nonce from any plugin-rendered page, and submits a crafted request to the createFluentCartTable action. Each request results in a new Ninja Table being persisted in the database. The attack is repeatable and scriptable, enabling rapid resource consumption. No user interaction beyond the attacker's own session is required. See the Wordfence Vulnerability Analysis and the WordPress FluentCartHandler Code for technical details.
Detection Methods for CVE-2026-2306
Indicators of Compromise
- Unexpected new entries in the wp_ninja_tables table or related Ninja Tables metadata tables
- Spikes in WordPress AJAX requests targeting the admin-ajax.php endpoint with FluentCart-related actions
- Sudden growth in WordPress database size without corresponding administrative activity
- Subscriber-level accounts generating activity against plugin admin endpoints
Detection Strategies
- Audit WordPress access logs for POST requests to admin-ajax.php referencing createFluentCartTable or FluentCart handler actions originating from low-privilege accounts
- Compare current Ninja Tables inventory against a known-good baseline to identify unauthorized table creation
- Review the WordPress user activity log for Subscriber accounts performing administrative-style actions
Monitoring Recommendations
- Enable a WordPress activity logging plugin to record all plugin-related AJAX actions and the invoking user role
- Monitor database size growth and table count metrics with alerting on abnormal increases
- Track the volume of authenticated requests per Subscriber account to detect automated abuse
How to Mitigate CVE-2026-2306
Immediate Actions Required
- Update the Ninja Tables plugin to a version newer than 5.2.6 that includes the patched createFluentCartTable authorization check
- Audit existing Subscriber-level accounts and remove any that are unrecognized or inactive
- Review the Ninja Tables database for unexpected entries created during the exposure window and remove them
Patch Information
The vendor addressed the issue in the WordPress Ninja Tables Changeset following version 5.2.6. The patch adds capability validation to the FluentCart handler before any table creation logic runs. Site administrators should apply the update through the WordPress plugin manager.
Workarounds
- Disable the Ninja Tables plugin until the patched version can be installed if active exploitation is suspected
- Restrict new user registration or set the default role to a non-Subscriber level that cannot authenticate to plugin endpoints
- Deploy a Web Application Firewall rule to block AJAX requests targeting createFluentCartTable from non-administrative sessions
# Configuration example: disable open registration in wp-config.php enforcement
wp option update users_can_register 0
wp plugin deactivate ninja-tables
wp plugin update ninja-tables
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
