What is CVE-2021-21694?

CVE-2021-21694 is a critical-severity vulnerability in Jenkins, classified under Missing Authorization. CVSS score: 9.8/10. Published 2021-11-04.

How severe is CVE-2021-21694?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Jenkins

CVE-2021-21694

FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace do not check any permissions in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Vulnerability class: Broken Access Control

EPSS: 0.015 (71.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins
Jenkins Project — versions unspecified

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-21694?: CVE-2021-21694 is a critical-severity vulnerability in Jenkins, classified under Missing Authorization. CVSS score: 9.8/10. Published 2021-11-04.
How severe is CVE-2021-21694?: Critical severity. CVSS v3 base score is 9.8 out of 10.