CVE-2023-28433

Minio Privilege Escalation on Windows via Path separator manipulation

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.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.30%
Vendor Advisory github.com
Affected: minio minio
Published at:
Updated at:

References

Link Tags
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

Frequently Asked Questions

What is the severity of CVE-2023-28433?
CVE-2023-28433 has been scored as a high severity vulnerability.
How to fix CVE-2023-28433?
To fix CVE-2023-28433, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28433 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28433 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28433?
CVE-2023-28433 affects minio minio.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.