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Vulnerability record · CVE-2023-28433 · published 22 March 2023

CVE-2023-28433: Minio exposure of resource to wrong sphere vulnerability

Minio · Minio

Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.

8.8 CVSS 3.1 High EPSS 0.98% · top 39.2% CWE-668 · Exposure of resource to wrong sphere
8.8CVSS 3.1 base score
0.98%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8 Patch
https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc Patch
https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z Release Notes
https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6 Vendor Advisory
https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8 Patch
https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc Patch
https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z Release Notes
https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-28433), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.