Remove dependency on is_safe_url()

netbox/netbox/views/generic/object_views.py

@@ -9,7 +9,6 @@ from django.forms.widgets import HiddenInput
 from django.shortcuts import redirect, render
 from django.urls import reverse
 from django.utils.html import escape
-from django.utils.http import is_safe_url
 from django.utils.safestring import mark_safe
 
 from extras.signals import clear_webhooks
@@ -259,9 +258,7 @@ class ObjectImportView(GetReturnURLMixin, BaseObjectView):
                 if '_addanother' in request.POST:
                     return redirect(request.get_full_path())
 
-                return_url = form.cleaned_data.get('return_url')
-                if return_url is not None and is_safe_url(url=return_url, allowed_hosts=request.get_host()):
-                    return redirect(return_url)
+                self.get_return_url(request, obj)
                 return redirect(self.get_return_url(request, obj))
 
             else:
@@ -507,10 +504,9 @@ class ObjectDeleteView(GetReturnURLMixin, BaseObjectView):
             messages.success(request, msg)
 
             return_url = form.cleaned_data.get('return_url')
-            if return_url is not None and is_safe_url(url=return_url, allowed_hosts=request.get_host()):
+            if return_url and return_url.startswith('/'):
                 return redirect(return_url)
-            else:
-                return redirect(self.get_return_url(request, obj))
+            return redirect(self.get_return_url(request, obj))
 
         else:
             logger.debug("Form validation failed")

netbox/users/views.py

@@ -10,7 +10,6 @@ from django.http import HttpResponseRedirect
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
 from django.utils.decorators import method_decorator
-from django.utils.http import is_safe_url
 from django.views.decorators.debug import sensitive_post_parameters
 from django.views.generic import View
 from social_core.backends.utils import load_backends
@@ -78,17 +77,17 @@ class LoginView(View):
         })
 
     def redirect_to_next(self, request, logger):
-        if request.method == "POST":
-            redirect_to = request.POST.get('next', settings.LOGIN_REDIRECT_URL)
-        else:
-            redirect_to = request.GET.get('next', settings.LOGIN_REDIRECT_URL)
+        data = request.POST if request.method == "POST" else request.GET
+        redirect_url = data.get('next', settings.LOGIN_REDIRECT_URL)
 
-        if redirect_to and not is_safe_url(url=redirect_to, allowed_hosts=request.get_host()):
-            logger.warning(f"Ignoring unsafe 'next' URL passed to login form: {redirect_to}")
-            redirect_to = reverse('home')
+        if redirect_url and redirect_url.startswith('/'):
+            logger.debug(f"Redirecting user to {redirect_url}")
+        else:
+            if redirect_url:
+                logger.warning(f"Ignoring unsafe 'next' URL passed to login form: {redirect_url}")
+            redirect_url = reverse('home')
 
-        logger.debug(f"Redirecting user to {redirect_to}")
-        return HttpResponseRedirect(redirect_to)
+        return HttpResponseRedirect(redirect_url)
 
 
 class LogoutView(View):

netbox/utilities/views.py

@@ -1,10 +1,7 @@
 from django.contrib.auth.mixins import AccessMixin
 from django.core.exceptions import ImproperlyConfigured
-from django.shortcuts import get_object_or_404, redirect
 from django.urls import reverse
 from django.urls.exceptions import NoReverseMatch
-from django.utils.http import is_safe_url
-from django.views.generic import View
 
 from .permissions import resolve_permission
 
@@ -103,9 +100,9 @@ class GetReturnURLMixin:
 
         # First, see if `return_url` was specified as a query parameter or form data. Use this URL only if it's
         # considered safe.
-        query_param = request.GET.get('return_url') or request.POST.get('return_url')
-        if query_param and is_safe_url(url=query_param, allowed_hosts=request.get_host()):
-            return query_param
+        return_url = request.GET.get('return_url') or request.POST.get('return_url')
+        if return_url and return_url.startswith('/'):
+            return return_url
 
         # Next, check if the object being modified (if any) has an absolute URL.
         if obj is not None and obj.pk and hasattr(obj, 'get_absolute_url'):