Cyber Resilience

CVE-2021-31927

Medium

Published: 10 June 2021

Published
10 June 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0017 38.3th percentile
Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-31927 is a medium-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Annexcloud Loyalty Experience Platform. Its CVSS base score is 4.3 (Medium).

Operationally, ranked at the 38.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

An Insecure Direct Object Reference (IDOR) vulnerability in Annex Cloud Loyalty Experience Platform <2021.1.0.1 allows any authenticated attacker to modify any existing user, including users assigned to different environments and clients. It was fixed in v2021.1.0.2.

CWE(s)
CWE-639

Related Threats

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

Affected Assets

annexcloud
loyalty experience platform
≤ 2020.1.0.1

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