The Monitoring Console app configured in Distributed mode allows for a Reflected XSS in a query parameter in Splunk Enterprise versions before 8.1.4. The Monitoring Console app is a bundled app included in Splunk Enterprise, not for download on SplunkBase, and not installed on Splunk Cloud Platform instances. Note that the Cloud Monitoring Console is not impacted.
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0505.html
https://research.splunk.com/application/splunk_xss_in_monitoring_console/