In Splunk Enterprise versions below 9.2.2, 9.1.5, and 9.0.10 on Windows, an authenticated user could execute a specially crafted query that they could then use to serialize untrusted data. The attacker could use the query to execute arbitrary code.
https://securityaffairs.com/165204/security/splunk-enterprise-and-cloud-platform-flaws.html
https://www.securityweek.com/splunk-patches-high-severity-vulnerabilities-in-enterprise-product/
https://research.splunk.com/application/1cf58ae1-9177-40b8-a26c-8966040f11ae/