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 python3
# -*- coding: utf-8 -*-
# import Flask

'''
Created on Nov 15, 2016

@author: jmartan
'''

from flask import Flask, request
import uni_func
import fill_set_widget
from lxml import etree

# Create an instance of Flask
app = Flask(__name__, static_url_path='/static')
app.config['DEBUG'] = True

# change this accordingly to the API user access
codec_username = 'apiuser'
codec_password = 'C1sco123'

@app.before_request
def before_request():
#
# for debugging only
#
#     if True:
#         print("HEADERS", request.headers)
#         print("REQ_path", request.path)
#         print("ARGS",request.args)
#         print("DATA",request.data)
#         print("FORM",request.form)
    pass
        
@app.route('/codec', methods=['POST', 'GET'])
def codec():

    data_req = request.data.decode('utf-8')
    app.logger.info('headers: {}'.format(request.headers))
    app.logger.info('values: {}'.format(data_req))

    xml_tree = etree.fromstring(data_req)

    action = xml_tree.xpath('/Event/UserInterface/Extensions/Widget/Action')
    if action:
        widget_value = None
        for x in action[0].iter():
            tag_l = x.tag.lower()
            if tag_l == 'widgetid' and x.text:
                widget_name = x.text.lower()
            if tag_l == 'type' and x.text:
                widget_event = x.text.lower()
            if tag_l == 'value' and x.text:
                widget_value = x.text.lower()

        app.logger.info('widget: {}, event: {}, value: {}'.format(widget_name, widget_event, widget_value))
        
        if widget_event == 'changed' and widget_name in ['red', 'green', 'blue']:
            if widget_name == 'red':
                uni_func.change_fill(red=int(widget_value))
            elif widget_name == 'blue':
                uni_func.change_fill(blue=int(widget_value))
            elif widget_name == 'green':
                uni_func.change_fill(green=int(widget_value))
        
        if widget_name == 'picture' and widget_event == 'pressed':
            if widget_value == 'smile':
                uni_func.display_pic(uni_func.COLOR_SMILE)
            elif widget_value == 'heart':
                uni_func.display_pic(uni_func.HEART, x_color=uni_func.PURPLE)
    else:
        layout_updated = xml_tree.xpath('/Event/UserInterface/Extensions/Widget/LayoutUpdated')
        if layout_updated:
            r, g, b = uni_func.unicorn.get_pixel(0,0)
            app.logger.info('widget layout updated or codec restarted, setting "red", "green" and "blue" widget values to {} - {} - {}'.format(r, g, b))
            fill_set_widget.update_widget(request.remote_addr, codec_username, codec_password, 'red', r)
            fill_set_widget.update_widget(request.remote_addr, codec_username, codec_password, 'green', g)
            fill_set_widget.update_widget(request.remote_addr, codec_username, codec_password, 'blue', b)
                
    return "OK"


# run the application
if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, threaded=True)
    
'''
feedback receiver registration example - to be configured in startup script or via CLI.

Note that if the web server doesn't respond or responds with error (4xx, 5xx message) the codec stops
sending events to the web server and feedback needs to be re-registered via CLI.

XML-friendly:
xCommand HttpFeedback register FeedbackSlot: 1 ServerUrl: "http://192.168.21.129:5000/codec" Expression: "/event/UserInterface/Extensions/Widget"

Less XML-friendly:
xCommand HttpFeedback register FeedbackSlot: 1 ServerUrl: "http://192.168.21.129:5000/codec" Expression: "/event/UserInterface/Extensions/Event"
'''

'''
XML-friendly slider output:

<Event>
  <Identification>
    <SystemName>Presenter</SystemName>
    <MACAddress>E4:AA:5D:A2:95:D4</MACAddress>
    <IPAddress>192.168.21.136</IPAddress>
    <ProductType>Cisco Codec</ProductType>
    <ProductID>Cisco TelePresence SX80</ProductID>
    <SWVersion>ce8.2.2.3263c59</SWVersion>
    <SerialNumber>FTT194201MZ</SerialNumber>
  </Identification>

  <UserInterface item="1">
    <Extensions item="1">
      <Widget item="1">
        <Action item="1">
          <WidgetId item="1">dimmer</WidgetId>
          <Value item="1">91</Value>
          <Type item="1">released</Type>
        </Action>
      </Widget>
    </Extensions>
  </UserInterface>
</Event>
'''

'''
XML-friendly toggle output:

<Event>
  <Identification>
    <SystemName>Presenter</SystemName>
    <MACAddress>E4:AA:5D:A2:95:D4</MACAddress>
    <IPAddress>192.168.21.136</IPAddress>
    <ProductType>Cisco Codec</ProductType>
    <ProductID>Cisco TelePresence SX80</ProductID>
    <SWVersion>ce8.2.2.3263c59</SWVersion>
    <SerialNumber>FTT194201MZ</SerialNumber>
  </Identification>

  <UserInterface item="1">
    <Extensions item="1">
      <Widget item="1">
        <Action item="1">
          <WidgetId item="1">light</WidgetId>
          <Value item="1">off</Value>
          <Type item="1">changed</Type>
        </Action>
      </Widget>
    </Extensions>
  </UserInterface>
</Event>
'''
```

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

  A) CWE-1004: Sensitive Cookie Without 'HttpOnly' Flag
  B) CWE-117: Improper Output Neutralization for Logs
  C) CWE-732: Incorrect Permission Assignment for Critical Resource
  D) CWE-611: Improper Restriction of XML External Entity Reference
  E) CWE-730: OWASP Top Ten 2004 Category A9 - Denial of Service
  F) CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Answer: B,D