What is CVE-2021-21604?

CVE-2021-21604 is a high-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 8.0/10. Published 2021-01-13.

How severe is CVE-2021-21604?

High severity. CVSS v3 base score is 8.0 out of 10.

Deserialization in Jenkins

CVE-2021-21604

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows attackers with permission to create or configure various objects to inject crafted content into Old Data Monitor that results in the instantiation of potentially unsafe objects once discarded by an administrator.

Vulnerability class: Insecure Deserialization

EPSS: 0.017 (74.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Jenkins
Jenkins Project — versions unspecified

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

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

Frequently asked questions

What is CVE-2021-21604?: CVE-2021-21604 is a high-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 8.0/10. Published 2021-01-13.
How severe is CVE-2021-21604?: High severity. CVSS v3 base score is 8.0 out of 10.