diff --git a/sources/Application/TwigBase/Twig/Extension.php b/sources/Application/TwigBase/Twig/Extension.php
index 9b243ea47..af88ea62d 100644
--- a/sources/Application/TwigBase/Twig/Extension.php
+++ b/sources/Application/TwigBase/Twig/Extension.php
@@ -141,6 +141,16 @@ class Extension
 		// @see https://www.php.net/manual/fr/function.var-export.php
 		$aFilters[] = new TwigFilter('var_export', 'var_export');
 
+		//since 2.7.7 3.0.2 3.1.0 N°4867 "Twig content not allowed" error when use the extkey widget search icon in the user portal
+		//overwrite native twig filter : disable use of 'system' filter
+		$aFilters[] = new TwigFilter('filter', function ($array, $arrow) {
+			if ($arrow == 'system') {
+				return json_encode($array);
+			}
+
+			return twig_array_filter($array, $arrow);
+		});
+
 		return $aFilters;
 	}