The admin panel in BlackCat CMS 1.3.6 allows stored XSS (by an admin) via the Display Name field to backend/preferences/ajax_save.php.
{ "versions": [ { "introduced": "0" }, { "last_affected": "1.3.6" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27237.json"