Apereo CAS through 6.4.1 allows XSS via POST requests sent to the REST API endpoints.
{
"nvd_published_at": "2021-12-07T22:15:00Z",
"github_reviewed": true,
"github_reviewed_at": "2021-12-08T20:20:15Z",
"cwe_ids": [
"CWE-79"
],
"severity": "MODERATE"
}