How severe is CVE-2021-21650?

CVE-2021-21650 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-2021-21650 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21650?

CVE-2021-21650 affects Jenkins S3 Publisher. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21650?

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

When was CVE-2021-21650 published?

CVE-2021-21650 was published on 2021-05-11 and last updated on 2026-06-17.

CVE-2021-21650

CVE-2021-21650 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: 3.5
EPSS exploit prediction: 1% (49th 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 Run/Artifacts permission checks in various HTTP endpoints and API models, allowing attackers with Item/Read permission to obtain information about artifacts uploaded to S3, if the optional Run/Artifacts permission is enabled.

Frequently asked questions

What is CVE-2021-21650?: Jenkins S3 publisher Plugin 0.11.6 and earlier does not perform Run/Artifacts permission checks in various HTTP endpoints and API models, allowing attackers with Item/Read permission to obtain information about artifacts uploaded to S3, if the optional Run/Artifacts permission is enabled.
How severe is CVE-2021-21650?: CVE-2021-21650 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-2021-21650 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21650?: CVE-2021-21650 affects Jenkins S3 Publisher. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21650?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21650 published?: CVE-2021-21650 was published on 2021-05-11 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2200

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-2021-21651 — Medium (CVSS 4.3): Jenkins S3 publisher Plugin 0.11.6 and earlier does not perform a permission check in an HTTP endpoint, allowing…

All CVEs affecting Jenkins S3 Publisher →