In Jenkins 2.196 and earlier, LTS 2.176.3 and earlier, the f:expandableTextBox form control interpreted its content as HTML when expanded, resulting in a stored XSS vulnerability exploitable by users with permission to define its contents (typically Job/Configure).
{
"cwe_ids": [
"CWE-79"
],
"github_reviewed_at": "2022-06-28T22:27:27Z",
"severity": "MODERATE",
"nvd_published_at": "2019-09-25T16:15:00Z",
"github_reviewed": true
}