diff --git a/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java b/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
index 095f6e15..e8265d58 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
@@ -500,7 +500,7 @@ public class KurentoSessionManager extends SessionManager {
 	}
 
 	@Override
-	public KurentoMediaOptions generateMediaOptions(Request<JsonObject> request) {
+	public KurentoMediaOptions generateMediaOptions(Request<JsonObject> request) throws OpenViduException {
 
 		String sdpOffer = RpcHandler.getStringParam(request, ProtocolElements.PUBLISHVIDEO_SDPOFFER_PARAM);
 		boolean hasAudio = RpcHandler.getBooleanParam(request, ProtocolElements.PUBLISHVIDEO_HASAUDIO_PARAM);
@@ -534,8 +534,17 @@ public class KurentoSessionManager extends SessionManager {
 		try {
 			JsonObject kurentoFilterJson = (JsonObject) RpcHandler.getParam(request,
 					ProtocolElements.PUBLISHVIDEO_KURENTOFILTER_PARAM);
-			kurentoFilter = new KurentoFilter(kurentoFilterJson.get("type").getAsString(),
-					kurentoFilterJson.get("options").getAsJsonObject());
+			if (kurentoFilterJson != null) {
+				try {
+					kurentoFilter = new KurentoFilter(kurentoFilterJson.get("type").getAsString(),
+							kurentoFilterJson.get("options").getAsJsonObject());
+				} catch (Exception e) {
+					throw new OpenViduException(Code.FILTER_NOT_APPLIED_ERROR_CODE,
+							"'filter' parameter wrong:" + e.getMessage());
+				}
+			}
+		} catch (OpenViduException e) {
+			throw e;
 		} catch (RuntimeException noParameterFound) {
 		}
 
diff --git a/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java b/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
index e4916e6b..a50463db 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
@@ -218,7 +218,12 @@ public class SessionRestController {
 			String sessionId = (String) params.get("session");
 			String roleString = (String) params.get("role");
 			String metadata = (String) params.get("data");
-			JsonObject kurentoOptions = new JsonParser().parse(params.get("kurentoOptions").toString()).getAsJsonObject();
+
+			JsonObject kurentoOptions = null;
+
+			if (params.get("kurentoOptions") != null) {
+				kurentoOptions = new JsonParser().parse(params.get("kurentoOptions").toString()).getAsJsonObject();
+			}
 
 			ParticipantRole role;
 			try {
diff --git a/openvidu-server/src/main/java/io/openvidu/server/rpc/RpcHandler.java b/openvidu-server/src/main/java/io/openvidu/server/rpc/RpcHandler.java
index dd02ba08..b5de9f51 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/rpc/RpcHandler.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/rpc/RpcHandler.java
@@ -33,6 +33,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
+import com.google.gson.JsonSyntaxException;
 
 import io.openvidu.client.OpenViduException;
 import io.openvidu.client.OpenViduException.Code;
@@ -375,8 +376,14 @@ public class RpcHandler extends DefaultJsonRpcHandler<JsonObject> {
 
 		String filterType = getStringParam(request, ProtocolElements.FILTER_TYPE_PARAM);
 		if (participant.getToken().getKurentoTokenOptions().isFilterAllowed(filterType)) {
-			JsonObject filterOptions = new JsonParser().parse(getStringParam(request, ProtocolElements.FILTER_OPTIONS_PARAM))
-					.getAsJsonObject();
+			JsonObject filterOptions;
+			try {
+				filterOptions = new JsonParser().parse(getStringParam(request, ProtocolElements.FILTER_OPTIONS_PARAM))
+						.getAsJsonObject();
+			} catch (JsonSyntaxException e) {
+				throw new OpenViduException(Code.FILTER_NOT_APPLIED_ERROR_CODE,
+						"'options' parameter is not a JSON object: " + e.getMessage());
+			}
 			String streamId = getStringParam(request, ProtocolElements.FILTER_STREAMID_PARAM);
 			sessionManager.applyFilter(sessionManager.getSession(rpcConnection.getSessionId()), streamId, filterType,
 					filterOptions, null, request.getId(), "applyFilter");