Jenkins Active Choices Plugin 2.4 and earlier does not escape List and Map return values of sandboxed scripts for Reactive Reference Parameters.
This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
This issue is caused by an incomplete fix for SECURITY-470.
Active Choices Plugin 2.5 escapes all legal return values of sandboxed scripts.
Jenkins Active Choices Plugin 2.4 and earlier does not escape the name and description of build parameters, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.