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Vulnerability record · CVE-2021-21669 · published 18 June 2021

CVE-2021-21669: Jenkins generic webhook trigger vulnerability

Jenkins · Generic Webhook Trigger

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

9.8 CVSS 3.1 Critical EPSS 26% · top 2.1%
9.8CVSS 3.1 base score, v2 7.5
26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/06/18/1 Mailing ListThird Party Advisory
https://www.jenkins.io/security/advisory/2021-06-18/#SECURITY-2330 Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/06/18/1 Mailing ListThird Party Advisory
https://www.jenkins.io/security/advisory/2021-06-18/#SECURITY-2330 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

5.4CVE-2022-25185Jenkins generic webhook trigger cross-site scripting vulnerabilityJenkins Generic Webhook Trigger Plugin 1.81 and earlier does not escape the build cause when using the webhook, resulting in a stored cross-site scri…EPSS 0.66%5.3CVE-2022-43412Jenkins generic webhook trigger observable discrepancy vulnerabilityJenkins Generic Webhook Trigger Plugin 1.84.1 and earlier uses a non-constant time comparison function when checking whether the provided and expecte…EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2021-21669), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.