CVE-2023-28432Known exploitationPublic exploitNetwork attack vector

Credential disclosure via unauthenticated bootstrap verification

Published Mar 22, 2023 · Updated Oct 21, 2025

Information disclosure in MinIO before RELEASE.2023-03-20T20-16-18Z allows remote attackers to read environment secrets from clusters. The bootstrap VerifyHandler serializes ServerSystemConfig without validating the request, and getServerSystemCfg copies unhashed MINIO_ values into that response. Exposure requires a reachable distributed deployment and can reveal root passwords, access keys, and other service credentials.

CVSS severity7.5
High
EPSS probability83.96%
Next 30 days · Sep 20, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in MinIO before RELEASE.2023-03-20T20-16-18Z allows remote attackers to read environment secrets from clusters. The bootstrap VerifyHandler serializes ServerSystemConfig without validating the request, and getServerSystemCfg copies unhashed MINIO_ values into that response. Exposure requires a reachable distributed deployment and can reveal root passwords, access keys, and other service credentials.

The record

CVE
CVE-2023-28432
Published
Mar 22, 2023
Updated
Oct 21, 2025
Vendor
MinIO
Product
MinIO
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= RELEASE.2019-12-17T23-16-33Z, < RELEASE.2023-03-20T20-16-18Z

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MinIO · MinIOversion=>= RELEASE.2019-12-17T23-16-33Z, < RELEASE.2023-03-20T20-16-18Z

Published CVSS scores

7.5GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsShadowserver observations through Sep 20, 2026. Gaps indicate unavailable data.
Sep 14, 2026Sep 20, 2026
View daily counts
Reporting dayUnique IPs
Sep 14, 20262
Sep 15, 20262
Sep 16, 20261
Sep 17, 20265
Sep 18, 20269
Sep 19, 202612
Sep 20, 20262
Latest reporting daySep 20, 2026
Latest daily unique IPs2
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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