Revive Adserver before 5.1.1 is vulnerable to a reflected XSS vulnerability in userlog-index.php via the `period_preset` parameter.
https://www.revive-adserver.com/security/revive-sa-2021-002/
https://hackerone.com/reports/1083231
https://github.com/revive-adserver/revive-adserver/commit/e2a67ce8