CVE-2021-21699: Jenkins Active Choices

Medium severity, CVSS 5.4. EPSS: 88.5% chance of exploitation in the next 30 days.

Jenkins Active Choices Plugin 2.5.6 and earlier does not escape the parameter name of reactive parameters and dynamic reference parameters, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Affected products

• Jenkins Active Choices: up to and including 2.5.6

Published 2021-11-12. Last modified 2026-06-17.