diff --git a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/history/HistoryPanel.java b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/history/HistoryPanel.java
index e93851a..0b42a88 100644
--- a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/history/HistoryPanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/history/HistoryPanel.java
@@ -115,10 +115,10 @@ public class HistoryPanel extends FramedPanel implements MonitorDialogListener {
 					@Override
 					public void render(Context context, OpHistory value,
 							SafeHtmlBuilder sb) {
-						sb.appendHtmlConstant("<p style='margin: 5px 5px 10px'><b>Date:</b>"
-								+ value.getDate() + "</p>");
-						sb.appendHtmlConstant("<p style='margin: 5px 5px 10px'><b>Description:</b> "
-								+ value.getDescription());
+						sb.appendHtmlConstant("<p style='margin: 5px 5px 10px'><b>Date:</b>").appendEscaped(
+								value.getDate()).appendHtmlConstant("</p>");
+						sb.appendHtmlConstant("<p style='margin: 5px 5px 10px'><b>Description:</b>")
+								.appendEscaped(value.getDescription()).appendHtmlConstant("</p>");
 					}
 				});
 
@@ -129,8 +129,8 @@ public class HistoryPanel extends FramedPanel implements MonitorDialogListener {
 
 			@Override
 			public void render(Context context, String value, SafeHtmlBuilder sb) {
-				sb.appendHtmlConstant("<span title='" + value + "'>" + value
-						+ "</span>");
+				sb.appendHtmlConstant("<span title='").appendEscaped(value).appendHtmlConstant("'>").appendEscaped(value).
+						appendHtmlConstant("</span>");
 
 			}
 
diff --git a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTablePanel.java b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTablePanel.java
index d433542..71915a6 100644
--- a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTablePanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTablePanel.java
@@ -22,6 +22,7 @@ import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.Scheduler;
 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
+import com.google.gwt.safehtml.shared.SafeHtmlUtils;
 import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.google.web.bindery.event.shared.EventBus;
 import com.sencha.gxt.data.client.loader.RpcProxy;
@@ -98,7 +99,7 @@ public class ValidationsTablePanel extends FramedPanel {
 
 			@Override
 			public void render(Context context, String value, SafeHtmlBuilder sb) {
-				sb.appendHtmlConstant("<span title='" + value + "'>" + value
+				sb.appendHtmlConstant("<span title='" + SafeHtmlUtils.htmlEscape(value) + "'>" + SafeHtmlUtils.htmlEscape(value)
 						+ "</span>");
 
 			}
diff --git a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTasksPanel.java b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTasksPanel.java
index 046ada4..3a17da4 100644
--- a/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTasksPanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/tablewidget/client/validation/ValidationsTasksPanel.java
@@ -176,7 +176,7 @@ public class ValidationsTasksPanel extends FramedPanel implements
 			@Override
 			public void render(Context context, String value, SafeHtmlBuilder sb) {
 				sb.appendHtmlConstant("<span title='"
-						+ SafeHtmlUtils.htmlEscape(value) + "'>" + value
+						+ SafeHtmlUtils.htmlEscape(value) + "'>" + SafeHtmlUtils.htmlEscape(value)
 						+ "</span>");
 
 			}