CVE-2021-21605: Jenkins

High severity, CVSS 8.0. EPSS: 2.2% chance of exploitation in the next 30 days.

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows users with Agent/Configure permission to choose agent names that cause Jenkins to override the global `config.xml` file.

Affected products

• Jenkins Jenkins: up to and including 2.263.1; up to and including 2.274

Published 2021-01-13. Last modified 2026-06-17.