Sitecore XP 7.5 to Sitecore XP 8.2 Update 7 is vulnerable to an insecure deserialization attack where remote commands can be executed by an attacker with no authentication or special configuration required.
View the template here CVE-2021-42237.yaml
References:
http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html