diff --git a/datamodels/2.x/itop-portal-base/portal/src/Form/ObjectFormManager.php b/datamodels/2.x/itop-portal-base/portal/src/Form/ObjectFormManager.php
index f354ee5d2..550366661 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/Form/ObjectFormManager.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/Form/ObjectFormManager.php
@@ -93,7 +93,7 @@ class ObjectFormManager extends FormManager
 	 * @since 2.7.6 3.0.0 N°4384 method creation : factorize as this is used twice now
 	 * @since 2.7.7 3.0.1 N°4867 now only used once, but we decided to keep this method anyway
 	 */
-	protected static function DecodeFormManagerData($formManagerData)
+	public static function DecodeFormManagerData($formManagerData)
 	{
 		if (is_array($formManagerData)) {
 			return $formManagerData;
diff --git a/datamodels/2.x/itop-portal-base/portal/src/Helper/ObjectFormHandlerHelper.php b/datamodels/2.x/itop-portal-base/portal/src/Helper/ObjectFormHandlerHelper.php
index b6361b417..bbb97cad6 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/Helper/ObjectFormHandlerHelper.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/Helper/ObjectFormHandlerHelper.php
@@ -451,7 +451,7 @@ class ObjectFormHandlerHelper
 	 * @throws \OQLException
 	 */
 	public function CheckReadFormDataAllowed($sFormManagerData){
-		$aJsonFromData = json_decode($sFormManagerData, true);
+		$aJsonFromData = ObjectFormManager::DecodeFormManagerData($sFormManagerData);
 		if(isset($aJsonFromData['formobject_class'])
 			&& isset($aJsonFromData['formobject_id'])
 			&& !$this->oSecurityHelper->IsActionAllowed(UR_ACTION_READ, $aJsonFromData['formobject_class'], $aJsonFromData['formobject_id'])){