Jenkins Validating String Parameter Plugin 2.4 and earlier does not escape various user-controlled fields, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
https://github.com/advisories/GHSA-fvwh-wv43-8qj5
https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1935