Kaneo is a project management application with boards, Gantt charts, and GitHub integration that can be self-hosted or used as a cloud service. Prior to 2.13.0, GET /api/external-link/task/:taskId returns integration.config to any workspace member, including the viewer role, when a task has a linked Gitea issue or pull request. The plaintext integration.config contains the Gitea accessToken and webhookSecret, allowing the token's granted Gitea actions and forged webhook deliveries that pass HMAC verification. GitHub integrations and installations without a configured Gitea integration are not affected. This issue is fixed in version 2.13.0.

Kaneo before 2.1.6 contains a missing authorization vulnerability that allows authenticated users to access other workspaces by supplying project, task, label or workspace identifiers to API routes lacking membership checks. Attackers who obtain identifiers, for example from shared project links, can read projects and tasks, modify or delete tasks, labels and comments, and search workspace contents.

Kaneo versions 2.3.12 before 2.12.2 contain a missing authorization vulnerability that allows authenticated workspace members with viewer or member roles to delete and modify tasks beyond their assigned permissions by exploiting the bulk task endpoint that omits workspace permission checks. Attackers can send requests to the PATCH /api/task/bulk endpoint, which verifies only workspace membership without calling the role-based permission check enforced on all other task endpoints, to permanently delete all tasks or modify task status, priority, assignee, due date, and labels in a workspace.