CVE-2021-21677

HIGHNVD 8.88.8—

8.8

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.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 79.2%
KEV: Not listed

Published

August 31, 2021

Last Modified

November 21, 2024

References (4)

jenkinsci-cert@googlegroupshttp://www.openwall.com/lists/oss-security/2021/08/31/1
jenkinsci-cert@googlegroupshttps://www.jenkins.io/security/advisory/2021-08-31/#SECURITY-2376
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/08/31/1
af854a3a-2127-422b-91ae-364da2661108https://www.jenkins.io/security/advisory/2021-08-31/#SECURITY-2376

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
io.jenkins.plugins:code-coverage-api	1.0.0 ... 1.4.0 (28 versions)	1.4.1	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 11× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 11:15 UTCEG score recompute
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-21677?

CVE-2021-21677 is a high vulnerability published on August 31, 2021. 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.

When was CVE-2021-21677 disclosed?

CVE-2021-21677 was first published in the National Vulnerability Database on August 31, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-21677 actively exploited?

CVE-2021-21677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21677?

CVE-2021-21677 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-21677?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21677, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-21677

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CVE-2021-21677

📅 Published

🔄 Last Modified

🔗 References (4)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-21677?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)