OpenProject is an open-source, web-based project management software. When using groups in OpenProject to manage users, the group members should only be visible to users that have the View Members permission in any project that the group is also a member of. Prior to versions 17.0.1 and 16.6.5, due to a failed permission check, if a user had the View Members permission in any project, they could enumerate all Groups and view which other users are part of the group. The issue has been fixed in OpenProject 17.0.1 and 16.6.5. No known workarounds are available.
History

Tue, 20 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Jan 2026 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Openproject
Openproject openproject
Vendors & Products Openproject
Openproject openproject

Mon, 19 Jan 2026 18:00:00 +0000

Type Values Removed Values Added
Description OpenProject is an open-source, web-based project management software. When using groups in OpenProject to manage users, the group members should only be visible to users that have the View Members permission in any project that the group is also a member of. Prior to versions 17.0.1 and 16.6.5, due to a failed permission check, if a user had the View Members permission in any project, they could enumerate all Groups and view which other users are part of the group. The issue has been fixed in OpenProject 17.0.1 and 16.6.5. No known workarounds are available.
Title OpenProject users with "View Members" permission in any project can view all Group memberships
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-01-19T17:52:35.307Z

Updated: 2026-01-20T14:51:21.936Z

Reserved: 2026-01-15T15:45:01.955Z

Link: CVE-2026-23721

cve-icon Vulnrichment

Updated: 2026-01-20T14:51:17.311Z

cve-icon NVD

Status : Received

Published: 2026-01-19T18:16:05.730

Modified: 2026-01-19T18:16:05.730

Link: CVE-2026-23721

cve-icon Redhat

No data.