Cyber Resilience

CVE-2023-28656

High

Published: 03 May 2023

Published
03 May 2023
Modified
19 May 2025
KEV Added
—
Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0032 55.1th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-28656 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Netapp Cloud Backup. Its CVSS base score is 8.1 (High).

Operationally, ranked in the top 44.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

NGINX Management Suite may allow an authenticated attacker to gain access to configuration objects outside of their assigned environment.   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CWE(s)
CWE-639

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

netapp
cloud backup
all versions
netapp
ontap select deploy
all versions
f5
nginx api connectivity manager
1.0.0 — 1.5.0
f5
nginx instance manager
2.0.0 — 2.9.0
f5
nginx security monitoring
1.0.0 — 1.3.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References