What’s Vulnerable › Vulnerabilities

CVE-2021-21646

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-21 · updated 2026-06-17

Description

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.

Affected products

• Jenkins Project Jenkins Templating Engine Plugin: through 2.1

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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