Security Resilience

CVE-2023-48252

Access Control in Bosch Nexo-Os 1000 – 1500-sp2

Published
10 January 2024
Modified
21 November 2024
Patch / advisory
CVSS Score v3.1 8.8
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:H
EPSS Score 0.0063 49th percentile
Risk Priority 65 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-48252 is a high-severity Improper Authorization (CWE-285) vulnerability in Bosch Nexo-Os. Its CVSS base score is 8.8 (High).

Operationally, ranked at the 49th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-24 (Access Control Decisions) and AC-25 (Reference Monitor) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

The vulnerability allows an authenticated remote attacker to perform actions exceeding their authorized access via crafted HTTP requests.

CWE(s)

Related Threats

CVEs Like This One

CVE-2023-48254Same product: Bosch Nexo-Os
CVE-2023-48257Same product: Bosch Nexo-Os
CVE-2023-48247Same product: Bosch Nexo-Os
CVE-2023-48243Same product: Bosch Nexo-Os
CVE-2023-48261Same product: Bosch Nexo-Os
CVE-2023-48265Same product: Bosch Nexo-Os
CVE-2023-48255Same product: Bosch Nexo-Os
CVE-2023-48249Same product: Bosch Nexo-Os
CVE-2023-48250Same product: Bosch Nexo-Os
CVE-2023-48256Same product: Bosch Nexo-Os

Affected Assets

bosch
nexo-os
1000 — 1500-sp2

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

Mandates that access-control decisions are made and applied to each request before access occurs.

Requires a tamperproof, always-invoked reference monitor that performs authorization checks.

Directly requires enforcement of approved authorizations for every access request, stopping improper or missing checks.

Limits granted privileges so that even a bypassed check affects fewer resources.

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.

blocks

A.5.1 only requires the existence of an overarching policy and topic-specific policies (including on access control); it does not itself perform or enforce any authorization check, so the CWE-285 weakness can still be exploited.

blocks

Mapping access rights to information classification and business requirements forces correct enforcement of authorization decisions, blocking the incorrect authorization weakness at the policy and implementation stage.

finds

Independent reviewers evaluate whether authorization logic matches policy, thereby reducing the window in which incorrect or missing authorization checks remain in production.

finds

By requiring managers to verify that authorization decisions match policy and to remediate deviations, the control limits the persistence of incorrect or missing authorization checks.

blocks

Requiring authorization processes and privilege assignments to be specified during project initiation prevents downstream components from receiving overly broad or incorrect rights that would allow unauthorized actions.

blocks

A.8.3 directly mandates and configures the authorization mechanisms (identity/group rights, dynamic access rules, isolation, credential enforcement) that stop CWE-285 exploitation; the bounded remainder is non-authorization exposure vectors such as error messages or observable discrepancies.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-285, a class-level weakness. Rules are authored against its narrower children: CWE-552.

References