This script is Copyright (C) 2015 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
Fabien Potencier reports :
End users can craft valid Twig code that allows them to execute
arbitrary code (RCEs) via the _self variable, which is always
available, even in sandboxed templates.
See also :
Update the affected package.
Risk factor :
Medium / CVSS Base Score : 6.8