// Improve performance and bug fixes

classes/module/Module.php

@@ -837,6 +837,8 @@ abstract class ModuleCore
 	  */
 	public static function getInstanceByName($module_name)
 	{
+		if (!Validate::isModuleName($module_name))
+			die(Tools::displayErrors());
 		if (!isset(self::$_INSTANCE[$module_name]))
 		{
 			if (Tools::file_exists_cache(_PS_MODULE_DIR_.$module_name.'/'.$module_name.'.php'))