CVE-2025-31489
MinIO performs incomplete signature validation for unsigned-trailer uploads
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.
How to fix CVE-2025-31489
To remediate CVE-2025-31489, upgrade the affected package to a fixed version below.
- —upgrade to 2023.12.23 or later
- —upgrade to 0.0.0-20250403145552-8c70975283f9 or later
- —upgrade to 0.0.0-20250403145552-8c70975283f9 or later
Is CVE-2025-31489 being exploited?
Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2023.12.23
- from 0, < 0.0.0-20250403145552-8c70975283f9
- from 0, < 0.0.0-20250403145552-8c70975283f9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |