CVE-2026-2289: Taskbuilder – Project Management & Task Management Tool With Kanban Board

Medium severity, CVSS 4.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Taskbuilder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 5.0.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Taskbuilder Taskbuilder – Project Management & Task Management Tool With Kanban Board: up to and including 5.0.3

Published 2026-03-04. Last modified 2026-06-17.