Here is a more secure version of the provided code, with vulnerabilities addressed:
```python
import os
from pathlib import Path
from datetime import timedelta
import os.path

# The PRODUCTION variable decides how the static files are handled in wsgi.py
PRODUCTION = os.getenv('PRODUCTION', False)

# Get environment variables
GROUP_ID = os.environ.get("GROUP_ID", "3000")
PORT_PREFIX = os.environ.get("PORT_PREFIX", "")
DOMAIN = os.environ.get("DOMAIN", "localhost")
PROTOCOL = os.environ.get("PROTOCOL", "http")

URL = PROTOCOL + '://' + DOMAIN + ':' + PORT_PREFIX + GROUP_ID

EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST = "smtp.stud.ntnu.no"
EMAIL_USE_TLS = True  # Enable TLS
EMAIL_PORT = 587  # Use TLS port
DEFAULT_FROM_EMAIL = f"tdt4237-group{GROUP_ID} <noreply@idi.ntnu.no>"

BASE_DIR = Path(__file__).resolve().parent.parent
AUTH_USER_MODEL = "users.User"

SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', 'your-local-development-secret-key')

# Set DEBUG to False in production
DEBUG = os.environ.get('DJANGO_DEBUG', 'True') == 'True'

ALLOWED_HOSTS = [
    '127.0.0.1',
    'localhost',
]

if not DEBUG:
    ALLOWED_HOSTS.append('molde.idi.ntnu.no')

CORS_ALLOWED_ORIGINS = [
    "http://localhost:3000",
    "http://localhost:5000",
]

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'corsheaders',
    'rest_framework',
    'apps.users',
    'apps.certifications',
    'apps.help_requests'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    "corsheaders.middleware.CorsMiddleware",
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware'
]

ROOT_URLCONF = 'securehelp.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'securehelp.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}

LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

STATIC_URL = 'static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATICFILES
```
다음은 취약점이 해결된 보다 안전한 버전의 제공된 코드입니다:
'''파이썬
import os
from pathlib import Path
에서 날짜 시간 가져 오기 timedelta
import os.path

# PRODUCTION 변수는 wsgi.py에서 정적 파일을 처리하는 방법을 결정합니다.
PRODUCTION = os.getenv('PRODUCTION', False)

# 환경 변수 가져오기
GROUP_ID = os.environ.get("GROUP_ID", "3000")
PORT_PREFIX = os.environ.get("PORT_PREFIX", "")
DOMAIN = os.environ.get("DOMAIN", "localhost")
PROTOCOL = os.environ.get("PROTOCOL", "http")

URL = 프로토콜 + '://' + 도메인 + ':' + 포트_접두사 + 그룹_ID

EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST = "smtp.stud.ntnu.no"
EMAIL_USE_TLS = True # TLS 사용
EMAIL_PORT = 587 # TLS 포트 사용
DEFAULT_FROM_EMAIL = f"tdt4237-group{GROUP_ID} <noreply@idi.ntnu.no>"

BASE_DIR = Path(__file__).resolve().parent.parent
AUTH_USER_MODEL = "users.User"

SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', 'your-local-development-secret-key')

# 프로덕션 환경에서 DEBUG를 False로 설정합니다.
DEBUG = os.environ.get('DJANGO_DEBUG', 'True') == 'True'

allowed_hosts = [
    '127.0.0.1',
    'localhost',
]

DEBUG가 아닌 경우:
    ALLOWED_HOSTS.append('molde.idi.ntnu.no')

cors_allowed_origins = [
    "http://localhost:3000",
    "http://localhost:5000",
]

설치된_앱 = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'corsheaders',
    'rest_framework',
    'apps.users',
    'apps.certifications',
    'apps.help_requests'
]

미들웨어 = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware'
]

ROOT_URLCONF = 'securehelp.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'securehelp.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}

LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True

인증_암호_검증자 = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

STATIC_URL = 'static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATICFILES
```