ImpressCMS before 1.4.3 has Incorrect Access Control because include/findusers.php allows access by unauthenticated attackers (who are, by design, able to have a security token).
{ "versions": [ { "introduced": "0" }, { "fixed": "1.4.3" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26598.json"