CVE-2021-21669

CRITICALNVD 9.89.8—

9.8

Jenkins Generic Webhook Trigger Plugin 1.72 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 43.8%
KEV: Not listed

Published

June 18, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 26, 2026

No patch confirmed yet.

generic

Jenkins Security Advisory 2021-06-18

https://www.jenkins.io/security/advisory/2021-06-18/#SECURITY-2330

generic

oss-security - Vulnerability in Jenkins Generic Webhook Trigger Plugin

http://www.openwall.com/lists/oss-security/2021/06/18/1

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.jenkins-ci.plugins:generic-webhook-trigger	0.1.0 ... 1.9 (73 versions)	1.74	—

Data Freshness Timeline

(refreshed 11× in last 7d / 19× 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 14:45 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch
2026-05-23 14:11 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-21669?

CVE-2021-21669 is a critical vulnerability published on June 18, 2021. Jenkins Generic Webhook Trigger Plugin 1.72 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

When was CVE-2021-21669 disclosed?

CVE-2021-21669 was first published in the National Vulnerability Database on June 18, 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-2021-21669 actively exploited?

CVE-2021-21669 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21669?

CVE-2021-21669 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-21669?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21669, 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-2021-21669

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