Cyber Resilience

CVE-2021-36388

HighPublic PoC

Published: 14 October 2021

Published
14 October 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0161 82.2th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-36388 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Yellowfinbi Yellowfin. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 17.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

In Yellowfin before 9.6.1 it is possible to enumerate and download users profile pictures through an Insecure Direct Object Reference vulnerability exploitable by sending a specially crafted HTTP GET request to the page "MIIAvatarImage.i4".

CWE(s)
CWE-639

Related Threats

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

Affected Assets

yellowfinbi
yellowfin
≤ 9.6.1

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