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CVE-2021-21669

44
FAUCET Score

CVE-2021-21669 is a critical XML External Entity (XXE) vulnerability affecting Jenkins Generic Webhook Trigger Plugin versions 1.72 and earlier. With a CVSS score of 9.8, this vulnerability allows unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability over the network with low attack complexity. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.72CPE matchmatch criteria
cpe:2.3:a:jenkins:generic_webhook_trigger:*:*:*:*:*:jenkins:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
25.75%
Probability of exploitation in next 30 days
EPSS Percentile
97.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2575 is in the 95th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: org.jenkins-ci.plugins:generic-webhook-triggerFixed in: 1.74
jenkinsvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

mavenGHSA-732f-w585-gmpccritical

XXE vulnerability in Jenkins Generic Webhook Trigger Plugin

May 24, 2022

References

jenkins.io / security/advisory/2021-06-18
Vendor Advisory
openwall.com / lists/oss-security/2021/06/18/1
Mailing ListThird Party Advisory