How severe is CVE-2021-21651?

CVE-2021-21651 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-21651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21651?

CVE-2021-21651 affects Jenkins S3 Publisher. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21651?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21651 published?

CVE-2021-21651 was published on 2021-05-11 and last updated on 2026-06-17.

CVE-2021-21651

CVE-2021-21651 is a medium-severity vulnerability in Jenkins S3 Publisher with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jenkins S3 Publisher
Published: 2021-05-11
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-21651?: CVE-2021-21651 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-21651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21651?: CVE-2021-21651 affects Jenkins S3 Publisher. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21651 published?: CVE-2021-21651 was published on 2021-05-11 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2201

Affected products (1)

cpe:2.3:a:jenkins:s3_publisher:*:*:*:*:*:jenkins:*:*

More vulnerabilities in Jenkins S3 Publisher

CVE-2020-2114 — High (CVSS 7.5): Jenkins S3 publisher Plugin 0.11.4 and earlier transmits configured credentials in plain text as part of the global…
CVE-2018-1000177 — Medium (CVSS 5.4): A cross-site scripting vulnerability exists in Jenkins S3 Plugin 0.10.12 and older in…
CVE-2021-21650 — Medium (CVSS 4.3): Jenkins S3 publisher Plugin 0.11.6 and earlier does not perform Run/Artifacts permission checks in various HTTP…

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