diff --git a/server/src/client/command_handler/server.cpp b/server/src/client/command_handler/server.cpp
index efa69e6..b069c45 100644
--- a/server/src/client/command_handler/server.cpp
+++ b/server/src/client/command_handler/server.cpp
@@ -402,6 +402,11 @@ command_result ConnectedClient::handleCommandServerGroupAddClient(Command &cmd)
         return command_result{error::client_invalid_id, "invalid cldbid"};
     }
 
+    ClientPermissionCalculator client_permissions{target_server, target_cldbid, ClientType::CLIENT_TEAMSPEAK, 0};
+    if(!permission::v2::permission_granted(client_permissions.calculate_permission(permission::i_client_needed_permission_modify_power).zero_if_unset(), this->calculate_permission(permission::i_client_permission_modify_power, 0))) {
+        return command_result{permission::i_client_needed_permission_modify_power};
+    }
+
     std::vector<std::shared_ptr<groups::ServerGroup>> added_groups{};
     added_groups.reserve(cmd.bulkCount());
 
@@ -521,6 +526,11 @@ command_result ConnectedClient::handleCommandServerGroupDelClient(Command &cmd)
         return command_result{error::client_invalid_id, "invalid cldbid"};
     }
 
+    ClientPermissionCalculator client_permissions{target_server, target_cldbid, ClientType::CLIENT_TEAMSPEAK, 0};
+    if(!permission::v2::permission_granted(client_permissions.calculate_permission(permission::i_client_needed_permission_modify_power).zero_if_unset(), this->calculate_permission(permission::i_client_permission_modify_power, 0))) {
+        return command_result{permission::i_client_needed_permission_modify_power};
+    }
+
     std::vector<std::shared_ptr<groups::ServerGroup>> removed_groups{};
     removed_groups.reserve(cmd.bulkCount());