CVE-2026-58660
Description
Kanboard through 1.2.52, fixed in commit 564cc30, BoardAjaxController save() method (used by the kanban board drag-and-drop endpoint) validates the caller's role on the attacker-supplied project_id but never verifies that the supplied task_id actually belongs to that project. Because task identifiers are sequential integers shared across the entire instance, any authenticated user who is a member of at least one project can enumerate and move (corrupt/hide) tasks belonging to any other project on the same instance, including private projects they have no membership or role on.
How to fix
- kanboard kanboard1.2.53 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kanboard kanboard | v < 1.2.53 | 1.2.53 |
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