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ExploitedIn CISA KEVFix available

CVE-2023-28434

Exploitation confirmed. First attested on 2023-09-19 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2023-03-22
  • Fixed in2023-03-20t20-16-18z
  • WeaknessCWE-269

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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`.

Timeline

dates in UTC
  1. 2023-03-2221:15CVE publishedNVD
  2. 2023-09-19Added to the CISA KEV catalogCISA KEV
  3. 2023-09-19Listed as exploited by GCVEGCVE
  4. 2023-09-19Exploitation first reportedCISA KEV
  5. 2025-01-2821:17SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-28434?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-28434?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Minio
BranchAffectedFixed in
2023.x< 2023-03-20t20-16-18z2023-03-20t20-16-18z
minio
BranchAffectedFixed in
2023.3< 2023.03.202023.03.20
minio/minio
BranchAffectedFixed in
0.0< 0.0.0-2023032004150.0.0-202303200415

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • minio
    Affected
    • = < RELEASE.2023-03-20T20-16-18Zno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-03-22

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • minioWolfiall versions · fixed in 0.20230413.030807-r0and 1 other package
  • minioMinimOSall versions · fixed in 0and 1 other package
  • minioChainguardall versions · fixed in 0.20230413.030807-r0and 1 other package

Full record on NVD

Fix

  1. Update Minio to 2023-03-20t20-16-18z
  2. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2023-10-10

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedAbelChe/evil_minio
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-09-19
Patch Due Date
2023-10-10
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-03-22
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-2pxw-r47w-4p8c

Frequently asked questions

What is CVE-2023-28434?

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`.

Is CVE-2023-28434 actively exploited?

Yes. CVE-2023-28434 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-10-10.

What is the CVSS score for CVE-2023-28434?

CVE-2023-28434 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record