AC-9509: Scheduled operation improvements.

Author: sreenia806

lib/internal/Magento/Framework/Filter/Input/MaliciousCode.php

@@ -50,6 +50,8 @@ public function __construct(?PurifierInterface $purifier = null)
         '/<\?\s*?(php|=).*>/Uis',
         //base64 usage
         '/src=[^<]*base64[^<]*(?=\/*\>)/Uis',
+        //command line injections
+        '/[|$`;!]/',
     ];
 
     /**