CVE-2023-28434MinIO is vulnerable to privilege escalation on Linux/MacOS
- 8.8HighCVSS base score
- 7.9%Exploitation in 30 daysEPSS · top 5.2% of all CVEs
- YesKnown exploitedin CISA's KEV since 19 Sept 2023
- YesPublic exploitsa reference or SSVC says so
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`.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as MinIO Security Feature Bypass Vulnerability.
- Added
- 19 Sept 2023
- Fix due (US federal)
- 10 Oct 2023
- Used by ransomware
- Not known
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 19 Sept 2023.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By GitHub_M
- 7 days later
· 7 days later
Published
- 6 months later
· 6 months later
Added to CISA KEV
Known exploited in the wild
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 7.9% · top 5.2% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/minio/minioGHSA-2pxw-r47w-4p8c (opens in a new tab)
References
References4
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/minio/minio/pull/16849 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-2395 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-2pxw-r47w-4p8c (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-28434)Record last updated .