Minio
CVE-2021-21362
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
MinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage service. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-285. 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. Affected products include: Minio.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
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.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)NVD
Minio is a Multi-Cloud Object Storage framework. Rated high severity (CVSS 8.8), this vulnerability is remotely exploita
Minio is a Multi-Cloud Object Storage framework. Rated high severity (CVSS 8.8), this vulnerability is remotely exploita
MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. Rated high severity (C
MinIO is a High Performance Object Storage released under Apache License v2.0. Rated high severity (CVSS 7.7), this vuln
Minio is a Multi-Cloud Object Storage framework. Rated high severity (CVSS 7.5), this vulnerability is remotely exploita
MinIO is a multi-cloud object storage solution. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitab
Minio is a Multi-Cloud Object Storage framework. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploi
MinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage se
Unauthenticated attackers can forge Embedded Console session tokens against MinIO deployments built up to RELEASE.2025-1
Authentication bypass in MinIO RELEASE.2023-05-18T00-05-36Z through RELEASE.2026-04-11T03-20-12Z allows remote unauthent
Authentication bypass in MinIO object storage allows remote attackers to write arbitrary objects to any bucket using onl
Minio is a Multi-Cloud Object Storage framework. Rated high severity (CVSS 8.8), this vulnerability is remotely exploita
Exploit-DB