CVE-2023-28434
HighExploitedPublic exploitPrivilege Escalation on Linux/MacOS
Published Sep 5, 2023 · Updated Oct 8, 2026 · Also known as BIT-minio-2023-28434, GHSA-2pxw-r47w-4p8c
Key Facts
Patch immediately- CVE-2023-28434 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Minio, github.com/minio/minio (go).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 4, 2023. Public exploit code is available.
- EPSS estimates a 7.9% probability of exploitation in the next 30 days.
- Fixed versions are available, including github.com/minio/minio 0.0.0-202303200415, Minio 0.20230413.030807-r0, Minio 2023.03.20.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
7.9%
Higher than 94.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-28434 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Minio is a Multi-Cloud Object Storage framework. Prior to RELEASE.2023-03-20T20-16-18Z, an attacker can use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing PostPolicyBucket. To carry out this attack, the attacker requires credentials with arn:aws:s3:::* permission, as well as enabled Console API access. This issue has been patched in RELEASE.2023-03-20T20-16-18Z. As a workaround, enable browser API access and turn off MINIO_BROWSER=off.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Sep 19, 2023 | Oct 10, 2023 | Not reported |
| Industry KEV feed | Sep 4, 2023 | Oct 10, 2023 | Not reported |
| CIRCL KEV | Sep 19, 2023 | Oct 10, 2023 | Not reported |
| ENISA EUVD | Sep 19, 2023 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
15 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MinioMinio | >= < RELEASE.2023-03-20T20-16-18Z | 2023-03-20t20-16-18z |
| github.com/minio/miniogo | See advisory | 0.0.0-202303200415 |
Patched Releases
github.com/minio/minio
0.0.0-202303200415
Minio
0.20230413.030807-r0, 2023.03.20, 2023-03-20t20-16-18z
Timeline
Added to Industry KEV feed
Sep 4, 2023
Publicly disclosed
Sep 5, 2023
Added to CISA KEV
Sep 19, 2023
Added to CIRCL KEV
Sep 19, 2023
Added to ENISA EUVD
Sep 19, 2023
Last updated
Oct 8, 2026
Weakness Type
- CWE-269 Improper Privilege Management
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28434.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-28434
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Minio is a Multi-Cloud Object Storage framework.
Affected: Minio versions >= < RELEASE.2023-03-20T20-16-18Z; github.com/minio/minio (go). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 4, 2023.
Yes. It was added on Sep 19, 2023 with a federal remediation due date of Oct 10, 2023.
Public exploit code is available.
Fixed versions are available, including github.com/minio/minio 0.0.0-202303200415, Minio 0.20230413.030807-r0, Minio 2023.03.20.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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