diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/pom.xml b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/pom.xml
index f5259cf84..837461fcb 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/pom.xml
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/pom.xml
@@ -60,6 +60,7 @@
                             org.osgi.service.component,
                             org.apache.commons.logging,
                             javax.xml,
+                            javax.xml.stream,
                             javax.xml.bind.*,
                             javax.sql,
                             javax.xml.parsers; version=0.0.0,
diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/AndroidDeviceManager.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/AndroidDeviceManager.java
index d3c42e923..60ff48725 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/AndroidDeviceManager.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/AndroidDeviceManager.java
@@ -47,6 +47,9 @@ import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
 import java.io.StringReader;
 import java.io.StringWriter;
 import java.nio.charset.Charset;
@@ -128,17 +131,21 @@ public class AndroidDeviceManager implements DeviceManager {
                             MobileDeviceTypes.MOBILE_DEVICE_TYPE_ANDROID);
             resource = MobileDeviceManagementUtil.getRegistryResource(androidRegPath);
             if (resource != null) {
-                JAXBContext context = JAXBContext.newInstance(PlatformConfiguration.class);
-                Unmarshaller unmarshaller = context.createUnmarshaller();
-                return (PlatformConfiguration) unmarshaller.unmarshal(
+                XMLInputFactory factory = XMLInputFactory.newFactory();
+                factory.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, false);
+                factory.setProperty(XMLInputFactory.SUPPORT_DTD, false);
+                XMLStreamReader reader = factory.createXMLStreamReader(
                         new StringReader(new String((byte[]) resource.getContent(), Charset.
                                 forName(AndroidPluginConstants.MobilePluginConstants.CHARSET_UTF8))));
+                JAXBContext context = JAXBContext.newInstance(PlatformConfiguration.class);
+                Unmarshaller unmarshaller = context.createUnmarshaller();
+                return (PlatformConfiguration) unmarshaller.unmarshal(reader);
             }
             return null;
         } catch (AndroidDeviceMgtPluginException e) {
             throw new DeviceManagementException(
                     "Error occurred while retrieving the Registry instance : " + e.getMessage(), e);
-        } catch (JAXBException e) {
+        } catch (JAXBException | XMLStreamException e) {
             throw new DeviceManagementException(
                     "Error occurred while parsing the Android configuration : " + e.getMessage(), e);
         } catch (RegistryException e) {
diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/util/MobileDeviceManagementUtil.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/util/MobileDeviceManagementUtil.java
index 210c73502..8ac7d9529 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/util/MobileDeviceManagementUtil.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android/src/main/java/org/wso2/carbon/device/mgt/mobile/android/impl/util/MobileDeviceManagementUtil.java
@@ -68,6 +68,7 @@ public class MobileDeviceManagementUtil {
 		factory.setNamespaceAware(true);
 		try {
 			factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
+			factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
 			DocumentBuilder docBuilder = factory.newDocumentBuilder();
 			return docBuilder.parse(file);
 		} catch (Exception e) {
diff --git a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/enrollment/impl/EnrollmentServiceImpl.java b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/enrollment/impl/EnrollmentServiceImpl.java
index 558cd601b..e13cb60cb 100644
--- a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/enrollment/impl/EnrollmentServiceImpl.java
+++ b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/enrollment/impl/EnrollmentServiceImpl.java
@@ -231,6 +231,7 @@ public class EnrollmentServiceImpl implements EnrollmentService {
 
             DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
             domFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
+            domFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
             DocumentBuilder builder;
 
             builder = domFactory.newDocumentBuilder();
diff --git a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/wstep/impl/CertificateEnrollmentServiceImpl.java b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/wstep/impl/CertificateEnrollmentServiceImpl.java
index f71aa52e2..24b5dc7ae 100644
--- a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/wstep/impl/CertificateEnrollmentServiceImpl.java
+++ b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/api/services/wstep/impl/CertificateEnrollmentServiceImpl.java
@@ -239,6 +239,8 @@ public class CertificateEnrollmentServiceImpl implements CertificateEnrollmentSe
 
             DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
             domFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
+            domFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+
             DocumentBuilder builder = domFactory.newDocumentBuilder();
             Document document = builder.parse(wapProvisioningFilePath);
             NodeList wapParm = document.getElementsByTagName(PluginConstants.CertificateEnrolment.PARM);
diff --git a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/impl/util/MobileDeviceManagementUtil.java b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/impl/util/MobileDeviceManagementUtil.java
index 72bf59ef2..bb5a7578b 100644
--- a/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/impl/util/MobileDeviceManagementUtil.java
+++ b/components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows/src/main/java/org/wso2/carbon/device/mgt/mobile/windows/impl/util/MobileDeviceManagementUtil.java
@@ -68,6 +68,7 @@ public class MobileDeviceManagementUtil {
 		factory.setNamespaceAware(true);
 		try {
 			factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
+			factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
 			DocumentBuilder docBuilder = factory.newDocumentBuilder();
 			return docBuilder.parse(file);
 		} catch (Exception e) {