CVE-2025-31489— MinIO performs incomplete signature validation for unsigned-trailer uploads
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I. Basic Information for CVE-2025-31489
Vulnerability Information
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Vulnerability Title
MinIO performs incomplete signature validation for unsigned-trailer uploads
Source: NVD (National Vulnerability Database)
Vulnerability Description
MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket. Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary. However with relevant information in place, uploading random objects to buckets is trivial and easy via curl. This issue is fixed in RELEASE.2025-04-03T14-56-28Z.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
MinIO 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MinIO是美国MinIO公司的一款开源的对象存储服务器。该产品支持构建用于机器学习、分析和应用程序数据工作负载的基础架构。 MinIO存在数据伪造问题漏洞，该漏洞源于授权签名组件可能无效，可能导致任意对象上传。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-31489
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket. Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary. However with relevant information in place, uploading random objects to buckets is trivial and easy via curl. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-31489.yaml | POC Details |
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IV. Related Vulnerabilities
Same product: minio
- CVE-2026-41145
MinIO has an Unauthenticated Object Write via Query-String C - CVE-2026-40344
MinIO has an Unauthenticated Object Write via Missing Signat - CVE-2026-39414
MinIO affected a DoS via Unbounded Memory Allocation in S3 S - CVE-2026-34204
MinIO is Vulnerable to SSE Metadata Injection via Replicatio - CVE-2026-33419
MinIO: LDAP login brute-force via user enumeration and missi
Same vendor: minio
- CVE-2026-41145
MinIO has an Unauthenticated Object Write via Query-String C - CVE-2026-40344
MinIO has an Unauthenticated Object Write via Missing Signat - CVE-2026-39414
MinIO affected a DoS via Unbounded Memory Allocation in S3 S - CVE-2026-34204
MinIO is Vulnerable to SSE Metadata Injection via Replicatio - CVE-2026-33419
MinIO: LDAP login brute-force via user enumeration and missi
Same weakness: CWE-347
- CVE-2026-42193
Plunk: SNS webhook forgery - CVE-2026-44497
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type - CVE-2026-41669
Admidio: SAML Signature Validation Result Ignored — Forged A - CVE-2026-7689
Dolibarr ERP CRM Online Signature security.lib.php dol_verif - CVE-2026-33467
Improper Verification of Cryptographic Signature in Elastic
V. Comments for CVE-2025-31489
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