Koko Analytics WordPress Plugin Arbitrary SQL Execution Vulnerability

A vulnerability allowing arbitrary SQL execution has been identified in Koko Analytics, a WordPress analytics plugin, in versions prior to 2.1.3. The issue arises from unescaped data in the analytics export/import process and a permissive SQL import feature for administrators. Unauthenticated users can send arbitrary path and referrer values to the public tracking endpoint, which are then stored in the database. The export function writes these values directly into SQL statements without proper escaping. When an administrator imports the exported SQL, the import process executes the SQL commands without validating table names or statement types. Additionally, authenticated users with the 'manage_koko_analytics' capability can upload malicious .sql files that are executed in the same unvalidated manner. This vulnerability could lead to severe consequences, such as deleting core WordPress tables, inserting backdoor administrator accounts, or other destructive actions.

Impact

Exploitation of this vulnerability allows for arbitrary SQL execution on the WordPress database, with potential consequences including the deletion of essential tables like 'wp_users', the creation of unauthorized administrator accounts, or other harmful actions that could escalate privileges.

Reproduction

To reproduce this vulnerability, first, install Koko Analytics version 2.1.2 on a WordPress site. Once the plugin is active, an unauthenticated visitor can send arbitrary path and referrer values to the tracking endpoint, which will store these values in the analytics database tables. Afterward, an administrator can export the analytics data, which will include the injected SQL payloads. When this exported SQL file is imported, the malicious SQL commands will be executed, leading to the exploitation of the vulnerability. Alternatively, an authenticated user with the 'manage_koko_analytics' capability can upload a malicious .sql file directly through the Koko Analytics Data import form, bypassing the export/import process altogether.

Remediation

Users can update to Koko Analytics version 2.1.3, which addresses the vulnerability by escaping path and URL values in the export process. After updating, it's recommended to review and clean the database of any potentially injected SQL payloads before reactivating the plugin.