What is CVE-2021-21695?

CVE-2021-21695 is a high-severity vulnerability in Jenkins, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2021-11-04.

How severe is CVE-2021-21695?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Jenkins

CVE-2021-21695

FilePath#listFiles lists files outside directories that agents are allowed to access when following symbolic links in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

EPSS: 0.021 (79.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Jenkins
Jenkins Project — versions unspecified

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)
jenkinsci-cert@googlegroups.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21695?: CVE-2021-21695 is a high-severity vulnerability in Jenkins, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2021-11-04.
How severe is CVE-2021-21695?: High severity. CVSS v3 base score is 8.8 out of 10.