CVE-2025-51479: Onyx

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Authorization bypass in update_user_group in onyx-dot-app Onyx Enterprise Edition 0.27.0 allows remote authenticated attackers to modify arbitrary user groups via crafted PATCH requests to the /api/manage/admin/user-group/id endpoint, bypassing intended curator-group assignment checks.

Affected products

• Onyx Onyx: version 0.27.0 only

Published 2025-07-22. Last modified 2026-06-17.