[WEB-4943]: add url has allowed host or scheme for validating valid redirections (#7809)

* feat: enhance path validation and URL safety in path_validator.py

* Added get_allowed_hosts function to retrieve allowed hosts from settings.
* Updated get_safe_redirect_url to validate URLs against allowed hosts.
* Improved URL construction logic for safer redirection handling.

* feat: enhance URL validation in authentication views

* Added url_has_allowed_host_and_scheme checks in SignUpAuthSpaceEndpoint and MagicSignInSpaceEndpoint for safer redirection.
* Updated redirect logic to fallback to base host if the constructed URL is not allowed.
* Improved overall URL safety and handling in authentication flows.

* fix: improve host extraction in get_allowed_hosts function

* Updated get_allowed_hosts to extract only the host from ADMIN_BASE_URL and SPACE_BASE_URL settings for better URL validation.
* Enhanced overall safety and clarity in allowed hosts retrieval.

apps/api/plane/authentication/views/space/email.py

@@ -3,6 +3,7 @@ from django.core.exceptions import ValidationError
 from django.core.validators import validate_email
 from django.http import HttpResponseRedirect
 from django.views import View
+from django.utils.http import url_has_allowed_host_and_scheme
 
 # Module imports
 from plane.authentication.provider.credentials.email import EmailProvider
@@ -200,7 +201,10 @@ class SignUpAuthSpaceEndpoint(View):
             # redirect to referer path
             next_path = validate_next_path(next_path=next_path)
             url = f"{base_host(request=request, is_space=True).rstrip("/")}{next_path}"
+            if url_has_allowed_host_and_scheme(url, allowed_hosts=get_allowed_hosts()):
                 return HttpResponseRedirect(url)
+            else:
+                return HttpResponseRedirect(base_host(request=request, is_space=True))
         except AuthenticationException as e:
             params = e.get_error_dict()
             url = get_safe_redirect_url(

apps/api/plane/authentication/views/space/magic.py

@@ -2,6 +2,7 @@
 from django.core.validators import validate_email
 from django.http import HttpResponseRedirect
 from django.views import View
+from django.utils.http import url_has_allowed_host_and_scheme
 
 # Third party imports
 from rest_framework import status
@@ -20,7 +21,7 @@ from plane.authentication.adapter.error import (
     AuthenticationException,
     AUTHENTICATION_ERROR_CODES,
 )
-from plane.utils.path_validator import get_safe_redirect_url, validate_next_path
+from plane.utils.path_validator import get_safe_redirect_url, validate_next_path, get_allowed_hosts
 
 
 class MagicGenerateSpaceEndpoint(APIView):
@@ -96,7 +97,10 @@ class MagicSignInSpaceEndpoint(View):
             # redirect to referer path
             next_path = validate_next_path(next_path=next_path)
             url = f"{base_host(request=request, is_space=True).rstrip("/")}{next_path}"
+            if url_has_allowed_host_and_scheme(url, allowed_hosts=get_allowed_hosts()):
                 return HttpResponseRedirect(url)
+            else:
+                return HttpResponseRedirect(base_host(request=request, is_space=True))
 
         except AuthenticationException as e:
             params = e.get_error_dict()
@@ -155,7 +159,10 @@ class MagicSignUpSpaceEndpoint(View):
             # redirect to referer path
             next_path = validate_next_path(next_path=next_path)
             url = f"{base_host(request=request, is_space=True).rstrip("/")}{next_path}"
+            if url_has_allowed_host_and_scheme(url, allowed_hosts=get_allowed_hosts()):
                 return HttpResponseRedirect(url)
+            else:
+                return HttpResponseRedirect(base_host(request=request, is_space=True))
 
         except AuthenticationException as e:
             params = e.get_error_dict()

apps/api/plane/utils/path_validator.py

@@ -1,6 +1,11 @@
+# Django imports
+from django.utils.http import url_has_allowed_host_and_scheme
+from django.conf import settings
+
 # Python imports
 from urllib.parse import urlparse
 
+
 def _contains_suspicious_patterns(path: str) -> bool:
     """
     Check for suspicious patterns that might indicate malicious intent.
@@ -38,6 +43,21 @@ def _contains_suspicious_patterns(path: str) -> bool:
     return False
 
 
+def get_allowed_hosts() -> list[str]:
+    """Get the allowed hosts from the settings."""
+    base_origin = settings.WEB_URL or settings.APP_BASE_URL
+    allowed_hosts = [base_origin]
+    if settings.ADMIN_BASE_URL:
+        # Get only the host
+        host = urlparse(settings.ADMIN_BASE_URL).netloc
+        allowed_hosts.append(host)
+    if settings.SPACE_BASE_URL:
+        # Get only the host
+        host = urlparse(settings.SPACE_BASE_URL).netloc
+        allowed_hosts.append(host)
+    return allowed_hosts
+
+
 def validate_next_path(next_path: str) -> str:
     """Validates that next_path is a safe relative path for redirection."""
     # Browsers interpret backslashes as forward slashes. Remove all backslashes.
@@ -92,7 +112,14 @@ def get_safe_redirect_url(base_url: str, next_path: str = "", params: dict = {})
     base_url = base_url.rstrip('/')
     if params:
         encoded_params = urlencode(params)
-        return f"{base_url}/?next_path={validated_path}&{encoded_params}"
+        url = f"{base_url}/?next_path={validated_path}&{encoded_params}"
+    else:
+        url = f"{base_url}/?next_path={validated_path}"
 
-    return f"{base_url}/?next_path={validated_path}"
+    # Check if the URL is allowed
+    if url_has_allowed_host_and_scheme(url, allowed_hosts=get_allowed_hosts()):
+        return url
+    
+    # Return the base URL if the URL is not allowed
+    return base_url