Executive brief
OpenProject is a web-based project management platform used for tracking tasks, projects, and team collaboration. A security flaw in the software's history tracking system allows unauthorized users to view sensitive information that should be hidden, such as private work package descriptions, internal comments, and restricted project details. This could lead to the exposure of confidential business data or historical records that were intended to be deleted or restricted.
Technical details
An information disclosure vulnerability exists in OpenProject's journal diff endpoint (GET /journals/:journal_id/diff/:field). The root cause is a failure in the JournalsController to enforce object-level, journal-level, and field-level visibility checks. While the endpoint verifies broad permissions (e.g., view_work_packages), it bypasses specific restrictions such as 'view_internal_comments' or 'view_project_attributes'. An attacker, potentially unauthenticated in public-project configurations, can exploit this to retrieve historical text values for work package descriptions, internal journals, and admin-only custom fields. The vulnerability is fixed in versions 17.3.3 and 17.4.1.
Affected products
- opf OpenProject < 17.3.3, >= 17.4.0 < 17.4.1
Timeline
- 2026-06-08: advisory: Original GitHub security advisory published
- 2026-06-26: disclosed: NVD publication date