CVE-2025-27414Network attack vector

Unauthenticated object access via absent-key acceptance

Published Feb 28, 2025 · Updated Mar 4, 2025

Authentication bypass in MinIO SFTP allows remote attackers to read, write, delete, and list policy-authorized objects with an untrusted SSH key. The public-key authentication path in cmd/sftp-server.go accepted a supplied key when the LDAP user record lacked the sshPublicKey attribute instead of rejecting authentication. Exploitation requires SFTP with LDAP identity enabled, a known LDAP username without that attribute, and a MinIO policy assigned to the user or one of its groups.

CVSS severity6.3
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in MinIO SFTP allows remote attackers to read, write, delete, and list policy-authorized objects with an untrusted SSH key. The public-key authentication path in cmd/sftp-server.go accepted a supplied key when the LDAP user record lacked the sshPublicKey attribute instead of rejecting authentication. Exploitation requires SFTP with LDAP identity enabled, a known LDAP username without that attribute, and a MinIO policy assigned to the user or one of its groups.

The record

CVE
CVE-2025-27414
Published
Feb 28, 2025
Updated
Mar 4, 2025
Vendor
MinIO
Product
MinIO
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 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.2024-06-06T09-36-42Z, < RELEASE.2025-02-28T09-55-16Z

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MinIO · MinIOversion=>= RELEASE.2024-06-06T09-36-42Z, < RELEASE.2025-02-28T09-55-16Z

Published CVSS scores

6.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
4.8GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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 IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo