CVE-2021-21670

MEDIUMNVD 4.34.3—

4.3

Jenkins 2.299 and earlier, LTS 2.289.1 and earlier allows users to cancel queue items and abort builds of jobs for which they have Item/Cancel permission even when they do not have Item/Read permission.

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 79.0%
KEV: Not listed

Published

June 30, 2021

Last Modified

November 21, 2024

References (4)

jenkinsci-cert@googlegroupshttp://www.openwall.com/lists/oss-security/2021/06/30/1
jenkinsci-cert@googlegroupshttps://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2278
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/06/30/1
af854a3a-2127-422b-91ae-364da2661108https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2278

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	jenkins-0:2.289.3.1633554819-1.el8	2021-10-19	redhat
redhat	jenkins-0:2.289.2.1629437819-1.el8	2021-09-08	redhat
redhat	jenkins-0:2.289.2.1628252553-1.el8	2021-08-17	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.jenkins-ci.main:jenkins-core	2.292 ... 2.299 (8 versions)	2.300	—

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 17× 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 14:16 UTCEG score recompute
2026-05-26 14:16 UTCVendor advisory
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-21670?

CVE-2021-21670 is a medium vulnerability published on June 30, 2021. Jenkins 2.299 and earlier, LTS 2.289.1 and earlier allows users to cancel queue items and abort builds of jobs for which they have Item/Cancel permission even when they do not have Item/Read permission.

When was CVE-2021-21670 disclosed?

CVE-2021-21670 was first published in the National Vulnerability Database on June 30, 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-2021-21670 actively exploited?

CVE-2021-21670 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21670?

CVE-2021-21670 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2021-21670?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21670, 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-2021-21670

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CVE-2021-21670

📅 Published

🔄 Last Modified

🔗 References (4)