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CVE-2021-21287

48
FAUCET Score

CVE-2021-21287 is a server-side request forgery (SSRF) vulnerability affecting MinIO, a high-performance object storage solution, in versions prior to RELEASE.2021-01-30T00-20-58Z. This flaw allows an authenticated attacker to manipulate URL-handling functionality, forcing the server to read or submit data to internal resources. With a CVSS score of 7.7 (High), the vulnerability has a network attack vector and low attack complexity, potentially leading to high confidentiality impact by exposing sensitive server configurations or internal services. While not currently on the KEV catalog or actively exploited, public exploit intelligence includes Nuclei templates, and its EPSS score of 0.91999 indicates a high probability of exploitation. Community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-01-30t00-20-58zCPE matchmatch criteria
cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
24.78%
Probability of exploitation in next 30 days
EPSS Percentile
97.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-21287 · Sep 14, 2021
This CVE's current EPSS score of 0.2478 is in the 97th 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 (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / minio/minio/commit/eb6871ecd960d570f70698877209e6db181bf276
PatchThird Party Advisory
github.com / minio/minio/pull/11337
PatchThird Party Advisory
github.com / minio/minio/releases/tag/RELEASE.2021-01-30T00-20-58Z
Release NotesThird Party Advisory
github.com / minio/minio/security/advisories/GHSA-m4qq-5f7c-693q
Third Party Advisory