CVE-2026-12090 is a SQL Injection vulnerability in the Taskbuilder – Project Management & Task Management Tool With Kanban Board WordPress plugin. The issue arises from improper neutralization of special elements in the 'wppm_proj_filter' parameter, which is used in SQL queries without sufficient escaping or preparation. The wp_ajax_wppm_view_project_tasks AJAX handler lacks nonce verification, enabling any authenticated user with subscriber-level privileges or higher to exploit the vulnerability. This allows attackers to append additional SQL commands to existing queries, potentially extracting sensitive database information. The vulnerability affects all plugin versions up to and including 5.0.8.

An attacker with authenticated subscriber-level access or higher can exploit this vulnerability to perform SQL Injection attacks, enabling unauthorized extraction of sensitive information from the database. The vulnerability does not affect availability or integrity but compromises confidentiality of data stored in the backend database.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict subscriber-level access where possible and monitor for suspicious activity. Implement additional security controls such as web application firewalls that can detect and block SQL Injection attempts targeting this plugin.