Cyber Resilience

CVE-2023-28656

Access Control in Netapp Cloud Backup

Published
03 May 2023
Modified
19 May 2025
Patch / advisory
CVSS Score v3.1 8.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0053 42th percentile
Risk Priority 60 floored blend · peak EPSS

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, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 42th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-22050Same product class: NAS / storage appliance
CVE-2024-4464Same product class: NAS / storage appliance
CVE-2026-44083Same product class: NAS / storage appliance
CVE-2024-50395Same product class: NAS / storage appliance
CVE-2025-26515Same product class: NAS / storage appliance
CVE-2023-27311Same product class: NAS / storage appliance
CVE-2021-41773Same product: Netapp Cloud Backup
CVE-2021-42013Same product: Netapp Cloud Backup
CVE-2024-8373Same product class: NAS / storage appliance
CVE-2024-28752Same product class: NAS / storage appliance

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.

addresses: CWE-639

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

addresses: CWE-639

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

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-05 full match
prevents

Enforcing authorization policy and least privilege directly blocks user-controlled key tampering that bypasses access checks.

PR.IR-01 mostly match
prevents

Logical access controls prevent unauthorized data access that results from missing authorization checks on object references.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing can detect missing authorization checks but does not prevent the weakness in production.

prevents

Information access restriction explicitly enforces that users may only retrieve data they are authorized to see, directly addressing user-controlled key bypass.

prevents

Access control policy directly requires enforcement of authorization rules that prevent unauthorized access via manipulated keys.

prevents

Managing access rights includes ensuring users can only access their own records and not bypass authorization by altering identifiers.

mitigates

Privileged access rights control restricts what data each user may access, mitigating direct object reference attacks.

prevents

Secure development lifecycle includes authorization design but does not itself implement runtime access checks.

References