What is CVE-2021-21651?

CVE-2021-21651 is a medium-severity vulnerability in Jenkins S3 Publisher. CVSS score: 4.3/10. Published 2021-05-11.

How severe is CVE-2021-21651?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Jenkins S3 Publisher

CVE-2021-21651

Jenkins S3 publisher Plugin 0.11.6 and earlier does not perform a permission check in an HTTP endpoint, allowing attackers with Overall/Read permission to obtain the list of configured profiles.

Published 2021-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Jenkins S3 Publisher
Jenkins Project S3 Publisher Plugin — versions unspecified, 0.11.5.1

References

www.jenkins.io/security/advisory/2021-05-11/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21651?: CVE-2021-21651 is a medium-severity vulnerability in Jenkins S3 Publisher. CVSS score: 4.3/10. Published 2021-05-11.
How severe is CVE-2021-21651?: Medium severity. CVSS v3 base score is 4.3 out of 10.