CVE-2021-21611: Jenkins

Medium severity, CVSS 5.4. EPSS: 1% chance of exploitation in the next 30 days.

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not escape display names and IDs of item types shown on the New Item page, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to specify display names or IDs of item types.

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.