Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-43858

45
FAUCET Score

CVE-2021-43858 affects MinIO, a Kubernetes native cloud storage application, allowing a malicious client to craft an HTTP API call to update user policies and gain elevated privileges. This vulnerability carries a high CVSS score of 8.8, indicating a network-based attack with low complexity that can lead to high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or significant community discussion, a patch is available in version RELEASE.2021-12-27T07-23-18Z, and a workaround exists by disabling the password change API for users.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-12-27t07-23-18zCPE matchmatch criteria
cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
35.46%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3546 is in the 98th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/search-collector-rhel9
redhatend of lifevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/assisted-installer-agent-rhel8
redhatend of lifevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/assisted-installer-reporter-rhel8
redhatend of lifevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/assisted-installer-rhel8

Vendor Advisories (1)

redhatCVE-2021-43858Important

minio: user privilege escalation in AddUser() admin API

Dec 27, 2021

References

github.com / minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf
PatchThird Party Advisory
github.com / minio/minio/pull/13976
PatchThird Party Advisory
github.com / minio/minio/pull/7949
PatchThird Party Advisory
github.com / minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z
Release NotesThird Party Advisory
github.com / minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx
PatchThird Party Advisory