Vulnerability in Minio

CVE-2025-31489

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.

Published · last modified .

EPSS exploit prediction

EPSS: 0.024 (83.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-31489: held from 0.024 to 0.024.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

  • Minio — versions < RELEASE.2025-04-03T14-56-28Z

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-31489?
CVE-2025-31489 is a vulnerability in Minio, classified under Improper Verification of Cryptographic Signature. Published 2025-04-03.
Is CVE-2025-31489 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.