Deserialization in Jenkins Code Coverage API

CVE-2021-21677

Jenkins Code Coverage API Plugin 1.4.0 and earlier does not apply Jenkins JEP-200 deserialization protection to Java objects it deserializes from disk, resulting in a remote code execution vulnerability.

Vulnerability class: Insecure Deserialization

EPSS: 0.022 (80.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-21677?
CVE-2021-21677 is a high-severity vulnerability in Jenkins Code Coverage API, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-08-31.
How severe is CVE-2021-21677?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-21677 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.