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 -*-
import os
import sys
import logging
import datetime
import subprocess
from distutils import spawn

import praw
import markdown2
from docopt import docopt
from jinja2 import Environment, PackageLoader
from distutils import spawn

USAGE = """reddit2kindle

Compiles requested number of top posts from specified subreddit
into a Kindle-formatted MOBI book.

Usage:
    r2k.py top <subreddit> [--posts=<n>] [--period=<t>] [options]
    r2k.py hot <subreddit> [--posts=<n>] [options]
    r2k.py particular <thread>

Options:
    --posts=<n>         The number of posts to include in the generated book.
                        [default: 10]
    --period=<t>        Pick the top posts from "hour", "day", "week", "month"
                        or "year".
                        [default: week]
    --debug             Enable debug logging.
"""
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

OUTPUT_FORMAT = 'epub'

def from_cli():
    args = docopt(USAGE)

    max_posts = int(args['--posts'])
    period = args['--period']
    subreddit = args['<subreddit>']
    thread_url = args['<thread>']

    # Setup logging.
    ch = logging.StreamHandler()
    ch.setLevel(logging.DEBUG if args['--debug'] else logging.INFO)
    fmt = logging.Formatter('[%(asctime)s][%(levelname)s] %(message)s')
    ch.setFormatter(fmt)
    logger.addHandler(ch)

    # This doesn't actually connect to Reddit. It creates a lazy proxy
    # that doesn't get resolved until you actually query for some
    # property.
    r = praw.Reddit(user_agent='reddit-selftext-to-kindle converter')
    sub = r.get_subreddit(subreddit)

    if args['top']:
        posts = {
            'all': sub.get_top_from_all,
            'year': sub.get_top_from_year,
            'month': sub.get_top_from_month,
            'week': sub.get_top_from_week,
            'day': sub.get_top_from_day,
            'hour': sub.get_top_from_hour
        }[period](limit=max_posts)
    elif args['hot']:
        posts = sub.get_hot(limit=max_posts)
    elif args['particular']:
        posts = sub.get_submission(url = thread_url)

    env = Environment(loader=PackageLoader('r2klib', 'templates'))
    thread_template = env.get_template('thread.jinja')

    logger.debug('generating html template...')
    with open('r2k_result.htm'.format(subreddit), 'wb') as fout:
        fout.write(thread_template.render(
            now=datetime.datetime.today(),
            post_count=max_posts,
            period=period,
            subreddit=subreddit,
            title=subreddit,
            posts=posts,
            markdown=markdown2.markdown,
            type_of_posts='top' if args['top'] else 'hot'
        ).encode('utf-8'))

    converted = False
    with open(os.devnull, 'w') as devnull:
        if os.path.isfile('./kindlegen'):
            subprocess.call([
                './kindlegen',
                'r2k_result.htm'
            ], stdout=devnull, stderr=subprocess.STDOUT)
            converted = True
        else:
            logger.info('could not locate kindlegen binary')

        if not converted:
            ebookconvert = spawn.find_executable("ebook-convert")
            if ebookconvert:
                subprocess.call([
                    ebookconvert,
                    'r2k_result.htm',
                    'r2k_result.' + OUTPUT_FORMAT
                ], stdout=devnull, stderr=subprocess.STDOUT)
                converted = True
            else:
                logger.info('could not locate ebook-convert binary')

    if converted:
        os.remove('r2k_result.htm')
        os.rename('r2k_result.' + OUTPUT_FORMAT, ('r2k_{sub}_{period}_{dt}.' + OUTPUT_FORMAT).format(
            sub=subreddit,
            period=period,
            dt=datetime.datetime.today().strftime('%d-%m-%Y')
        ))
    else:
        logger.warning(
            'Could not locate kindlegen or ebook-convert for automatic'
            ' MOBI creation. Either download these tools, or email the'
            '.html to your kindle address.'
        )

if __name__ == '__main__':
    sys.exit(from_cli())

```

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

  A) CWE-326: Inadequate Encryption Strength
  B) CWE-918: Server-Side Request Forgery (SSRF)
  C) CWE-209: Generation of Error Message Containing Sensitive Information
  D) CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  E) CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
  F) CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Answer: D