system: You are an expert security code reviewer. You will be shown a source code file along with a multi-select question listing several CWE (Common Weakness Enumeration) categories. Your task is to identify which of the listed CWEs are present in the code.

OUTPUT FORMAT: Respond with the letter(s) of all correct options, sorted alphabetically and comma-separated, wrapped in a single \boxed{...}. Examples: `\boxed{A}` for one correct, `\boxed{A,C}` for two, `\boxed{A,C,E}` for three. Output the boxed answer ONLY -- no explanation, no other text.

user: ```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Generate grafana dashboard in json format from the yaml templates

import json
import yaml
import argparse
from jinja2 import Environment, FileSystemLoader


def render(name, env_var):
    env = Environment(loader=FileSystemLoader('.'))
    template = env.get_template('%s.yml.template' % name)
    raw_result = template.render(index=range(100, 1000), **env_var)
    yaml_result = yaml.load(raw_result)
    json_result = json.dumps(yaml_result)
    with open('%s_generated.json' % name, 'w') as f:
        f.write(json_result)


def init_argparse():
    parser = argparse.ArgumentParser()
    parser.add_argument("-d", "--domain",
                        help="domain name of nodes in graphite format : _my_example_com",
                        type=str,
                        required=False, default="")
    parser.add_argument("-M", "--master-names",
                        help="master host names: master01 master02 something",
                        type=str,
                        required=False,
                        nargs='+',
                        default=[])
    parser.add_argument("-N", "--node-names",
                        help="node host names: node01 node02 tom",
                        type=str,
                        required=False,
                        nargs='+',
                        default=[])
    parser.add_argument("-T", "--tool-names",
                        help="tools host names: monitoring backup",
                        type=str,
                        required=True,
                        nargs='+',
                        default=[]),
    parser.add_argument("-m", "--master-number",
                        help="Number of master",
                        type=int,
                        required=False,
                        default=0)
    parser.add_argument("-n", "--node-number",
                        help="Number of node",
                        type=int,
                        required=False,
                        default=0)
    return parser.parse_args(), parser

if __name__ == "__main__":
    args, parser = init_argparse()

    _master_names = args.master_names + ["master%02d" % x for x in range(1, args.master_number + 1)]
    _node_names = args.node_names + ["node%02d" % x for x in range(1, args.node_number + 1)]

    if not _master_names:
        parser.print_help()
        print "You should specify at least --master-names or --master-number"
        exit()

    if not _node_names:
        parser.print_help()
        print "You should specify at least --node-names or --node-number"
        exit()

    env_var = {"domain": args.domain,
               "masters": _master_names,
               "nodes": _node_names,
               "tools": args.tool_names
               }
    render(name='masters', env_var=env_var)
    render(name='nodes', env_var=env_var)
    render(name='tools', env_var=env_var)

```

Which of the following CWE vulnerability categories are present in this code? Multiple options may be correct.

  A) CWE-327: Use of a Broken or Risky Cryptographic Algorithm
  B) CWE-295: Improper Certificate Validation
  C) CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
  D) CWE-730: OWASP Top Ten 2004 Category A9 - Denial of Service
  E) CWE-326: Inadequate Encryption Strength
  F) CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Answer: F