CVE-2021-21646

8.8 highEPSS 1.7%

High (8.8) in jenkins templating engine. EPSS 1.7% chance of exploitation in the next 30 days. Fixed in org.jenkins-ci.plugins:templating-engine 2.2.

Jenkins Templating Engine Plugin 2.1 and earlier does not protect its pipeline configurations using Script Security Plugin, allowing attackers with Job/Configure permission to execute arbitrary code in the context of the Jenkins controller JVM.

Severity

CVSS 3.1

8.8 high

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

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
Published: 2021-04-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

jenkins:templating_engine

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-p6qc-37hq-wqr6	Maven	org.jenkins-ci.plugins:templating-engine	<2.2	2.2

References

http://www.openwall.com/lists/oss-security/2021/04/21/2
https://www.jenkins.io/security/advisory/2021-04-21/#SECURITY-2311
http://www.openwall.com/lists/oss-security/2021/04/21/2
https://www.jenkins.io/security/advisory/2021-04-21/#SECURITY-2311

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