Auth bypass in Jenkins
CVE-2021-21688
The agent-to-controller security check FilePath#reading(FileVisitor) in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not reject any operations, allowing users to have unrestricted read access using certain operations (creating archives, FilePath#copyRecursiveTo).
Vulnerability class: Broken Access Control
EPSS: 0.013 (68.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Jenkins
- Jenkins Project — versions unspecified
Weakness classification (CWE)
References
- jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21688?
- CVE-2021-21688 is a high-severity vulnerability in Jenkins, classified under Missing Authorization. CVSS score: 7.5/10. Published 2021-11-04.
- How severe is CVE-2021-21688?
- High severity. CVSS v3 base score is 7.5 out of 10.