Is CVE-2021-21362 in the CISA KEV catalog?

No. CVE-2021-21362 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-21362?

CVE-2021-21362 has a CVSS v3 base score of 7.7 (HIGH).

What is the EPSS score for CVE-2021-21362?

CVE-2021-21362 has an EPSS score of 1.32% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-21362?

Upgrade minio to 2021-03-04t00-53-13z or later.

CVE & CISA-KEV Catalog

CVE-2021-21362

HIGH

7.7

CVSS v3

NVD

Description

MinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage service. In MinIO before version RELEASE.2021-03-04T00-53-13Z it is possible to bypass a readOnly policy by creating a temporary 'mc share upload' URL. Everyone is impacted who uses MinIO multi-users. This is fixed in version RELEASE.2021-03-04T00-53-13Z. As a workaround, one can disable uploads with `Content-Type: multipart/form-data` as mentioned in the S3 API RESTObjectPOST docs by using a proxy in front of MinIO.

CWE-285 CWE-863Incorrect Authorization

How to fix

Remediation Available

minioNVD

Affected:< 2021-03-04t00-53-13zFixed in:2021-03-04t00-53-13zCVE-2021-21362derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Exploit Intelligence

1.32%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-285 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2021-28799	Critical	10.0	78%	KEV + Ransom	Fix
CVE-2023-32707	High	8.8	74%	-	Fix
CVE-2023-48241	High	7.5	73%	-	Fix
CVE-2023-22480	High	7.3	67%	-	Fix
CVE-2022-3229	Critical	9.8	66%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.