Sure - depending on if you play Java or Bedrock, you can report a player at https://reports.cubecraft.net/ or https://cbecrft.net/BedrockReports.
^ If you need more info for Java: https://www.cubecraft.net/threads/how-to-report-players-java.175577/ For Bedrock: https://www.cubecraft.net/threads/how-to-report-a-bedrock-player-or-bug.220859/ :)