Executive brief
Worklenz is a project management tool used by teams to collaborate on tasks and projects. A flaw in versions before 3.0.0 fails to properly verify that users can only access tasks belonging to their organization, allowing authenticated attackers to view confidential work logs, comments, attachments, and project insights from other organizations by simply querying task endpoints with arbitrary identifiers.
Technical details
This is an authorization bypass vulnerability in Worklenz's task-scoped API endpoints. The application fails to verify task ownership against the authenticated user's organization when processing requests to task-related endpoints. An authenticated attacker can craft requests with arbitrary task UUIDs to retrieve sensitive data (work logs, comments, attachments, project insights) belonging to other tenants. The vulnerability requires authentication but no special privileges, and the fix is available in version 3.0.0 and later via a verify-task-access middleware implementation.
Affected products
- Worklenz Worklenz before 3.0.0
Timeline
- 2026-09-03: disclosed
- 2026: patched: Fix available in version 3.0.0 and later