CVE-2026-1640 Taskbuilder <= 5.0.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Project/Task Comment Creation
Authenticated subscribers can bypass authorization to create comments on private projects and inject HTML/CSS in the Taskbuilder WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1640?
CVE-2026-1640 is a medium-severity missing authorization vulnerability in Taskbuilder – Project Management & Task Management Tool With Kanban Board, published on 18 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Taskbuilder – WordPress Project Management & Task Management plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 5.0.2. This is due to missing authorization checks on the project and task comment submission functions (AJAX actions: wppm_submit_proj_comment and wppm_submit_task_comment). This makes it possible for authenticated attackers, with subscriber-level access and above, to create comments on any project or task (including private projects they cannot view or are not assigned to), and inject arbitrary HTML and CSS via the insufficiently sanitized comment_body parameter.
Weakness: CWE-862
Which versions are affected by CVE-2026-1640?
How do I fix CVE-2026-1640?
No fix has been published for CVE-2026-1640 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1640 being exploited?
There is no known exploitation of CVE-2026-1640 in the wild and no public exploit code.
Sources
Also known as GHSA-wxhm-86c2-x66c.