Vulnerability details

Kanboard before 1.2.53, 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.

• https://github.com/kanboard/kanboard/issues/5852 technical-descriptionexploitissue-tracking
• https://github.com/kanboard/kanboard/pull/5853 issue-trackingpatch
• https://github.com/kanboard/kanboard/commit/564cc30e1e360959572e01e158734d9475c05903 patch
• https://www.vulncheck.com/advisories/kanboard-boardajaxcontroller-missing-ownership-check-via-drag-and-drop third-party-advisory