What is CVE-2025-51479?

CVE-2025-51479 is a medium-severity vulnerability in Onyx, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2025-07-22.

How severe is CVE-2025-51479?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Onyx

CVE-2025-51479

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (20.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Onyx — versions 0.27.0
N/a — versions n/a

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-51479?: CVE-2025-51479 is a medium-severity vulnerability in Onyx, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2025-07-22.
How severe is CVE-2025-51479?: Medium severity. CVSS v3 base score is 5.4 out of 10.