CVE-2021-21697: Jenkins

Critical severity, CVSS 9.1. EPSS: 1.6% chance of exploitation in the next 30 days.

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier allows any agent to read and write the contents of any build directory stored in Jenkins with very few restrictions.

Affected products

• Jenkins Jenkins: up to and including 2.303.2; up to and including 2.318

Published 2021-11-04. Last modified 2026-06-17.