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
# -*- coding: utf-8 -*-
import requests
import json
import os
import re
from flask import Flask, url_for, request, redirect, Response

app = Flask(__name__)

URL = 'https://kotoha-server.herokuapp.com/api/phrases.json'

# Check token if you don't want to conflict with other slash commands
#SLACK_KEY =  os.environ['SLACK_KEY']

@app.route('/kotoha',methods=['POST'])
def kotoha():
    """
    Example:
        /kotoha (tag|text) []
    """
    text = request.values.get('text')
    # Check token if you don't want to conflict with other slash commands
    #slack_key = request.values.get('token')
    #if debug is False:
    #    if slack_key != SLACK_KEY:
    #        return 'slack token does not match'
    #else:
    #    print('It\'s debug mode')

    if not text:
        return 'hint: (tag|text) [word]'

    '''parse text'''
    match = re.search('(tag|text)\s*(.*)', text)
    if match:
        kind = match.group(1)
        words = match.group(2)
        if request.method == 'POST':
            req = get_request_string(kind, words)
            query_json = json.loads(requests.get(req).content.decode('utf-8'))
            resp_qs = [':four_leaf_clover: Kotoha for {}:{}\n'.format(kind,words)]
            '''debug'''
            #resp_j = map(get_response_string, query_json)
            #print('response: {}'.format(resp_j))
            '''debug end'''
            resp_qs.extend(map(get_response_string, query_json))
            return Response('\n'.join(resp_qs), content_type='text/plain; charset=utf-8')
    else:
        return 'hint: (tag|text) [words]'

@app.route('/')
def index():
    return redirect('https://github.com/tomoima525')

def get_request_string(kind, words):
    tag_param = '{}={}'.format(kind,words)
    return '?'.join([URL,tag_param])

def get_response_string(qdict):
    return '{} from {}'.format(qdict.get('text'),qdict.get('tag_list'))

if __name__ == '__main__':
    # Bind to PORT if defined, otherwise default to 5000.
    port = int(os.environ.get('PORT', 5000))
    debug = os.environ.get('DEBUG', False)
    app.run(host='0.0.0.0', port=port, debug = debug)

```

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

  A) CWE-209: Generation of Error Message Containing Sensitive Information
  B) CWE-327: Use of a Broken or Risky Cryptographic Algorithm
  C) CWE-116: Improper Encoding or Escaping of Output
  D) CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  E) CWE-94: Improper Control of Generation of Code ('Code Injection')
  F) CWE-918: Server-Side Request Forgery (SSRF)
Answer: F