CVE-2021-43858
Prior to version `RELEASE.2021-12-27T07-23-18Z`, a malicious client can hand-craft an HTTP API call that allows for updating policy for a user and gaining higher privileges.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 35.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
MinIO is a Kubernetes native application for cloud storage. Prior to version `RELEASE.2021-12-27T07-23-18Z`, a malicious client can hand-craft an HTTP API call that allows for updating policy for a user and gaining higher privileges. The patch in version `RELEASE.2021-12-27T07-23-18Z` changes the accepted request body type and removes the ability to apply policy changes through this API. There is a workaround for this vulnerability: Changing passwords can be disabled by adding an explicit `Deny` rule to disable the API for users.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 35.46% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-269, CWE-863
- Affected
- minio/minio
- Source
- security-advisories@github.com
EPSS 35.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abfPatch, Third Party Advisory
- https://github.com/minio/minio/pull/13976Patch, Third Party Advisory
- https://github.com/minio/minio/pull/7949Patch, Third Party Advisory
- https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18ZRelease Notes, Third Party Advisory
- https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cxPatch, Third Party Advisory
- https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abfPatch, Third Party Advisory
- https://github.com/minio/minio/pull/13976Patch, Third Party Advisory
- https://github.com/minio/minio/pull/7949Patch, Third Party Advisory
- https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18ZRelease Notes, Third Party Advisory
- https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cxPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.