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
from django.core.exceptions import ValidationError
from django.core.validators import URLValidator
from rest_framework import status
from rest_framework.mixins import CreateModelMixin, RetrieveModelMixin, ListModelMixin, DestroyModelMixin
from rest_framework.response import Response
from rest_framework.viewsets import GenericViewSet

from .models import Torrent
from .serializers import TorrentSerializer
from .utils import transmission


class TorrentViewSet(CreateModelMixin, RetrieveModelMixin, ListModelMixin, DestroyModelMixin, GenericViewSet):
    """
    Torrent API endpoint for Torrent model (/torrents).
    Supported methods: Create, Retrieve, List, Destroy
    """
    queryset = Torrent.objects.all()
    serializer_class = TorrentSerializer

    def get_queryset(self):
        """
        Gets torrents queryset of the user.

        :return: QuerySet
        """
        return self.request.user.torrents.all()

    def create(self, request, *args, **kwargs):
        """
        Creates a Torrent object links it to the user.
        Validates `url` query parameter whether is a magnet/torrent link or not.

        :return: Response
        """
        link = request.data.get('link', '').strip()
        url_validator = URLValidator()

        try:
            if not link.startswith('magnet:'):
                url_validator(link)
                if not link.endswith('.torrent'):
                    raise ValidationError("Invalid torrent URL.")
        except ValidationError as e:
            return Response({'detail': e}, status=status.HTTP_400_BAD_REQUEST)

        torrent = transmission.add_torrent(link)
        torrent_model, created = Torrent.objects.get_or_create(
            hash=torrent.hashString,
            defaults={
                'name': torrent.name,
                'private': torrent.isPrivate,
            },
        )

        request.user.torrents.add(torrent_model)

        return Response(
            self.serializer_class(torrent_model).data,
            status=created and status.HTTP_201_CREATED or status.HTTP_200_OK
        )

    def destroy(self, request, *args, **kwargs):
        """
        Un-links a torrent object from the user.

        :return: Response
        """
        torrent_model = self.get_object()
        self.request.user.torrents.remove(torrent_model)

        return Response(status=status.HTTP_204_NO_CONTENT)

```

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

  A) CWE-377: Insecure Temporary File
  B) CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
  C) CWE-1004: Sensitive Cookie Without 'HttpOnly' Flag
  D) CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  E) CWE-215: Insertion of Sensitive Information Into Debugging Code
  F) CWE-209: Generation of Error Message Containing Sensitive Information
Answer: F