The plugin is vulnerable to Reflected Cross-Site Scripting via the startdate parameter found in the ~/includes/admin/logging/class-log-table-list.php file which allows attackers to inject arbitrary web scripts WPScanTeam: The issue was reported as fixed, but the fix was insufficient and a separate advisory has been made for it
https://example.com/wp-admin/tools.php?page=wpf-settings-logs&startdate="><script>alert(/XSS-start/)</script>&enddate="><script>alert(/XSS-end/)</script>