diff --git a/docs/release-notes/version-2.6.md b/docs/release-notes/version-2.6.md
index cde5b3e80..3149f3cb9 100644
--- a/docs/release-notes/version-2.6.md
+++ b/docs/release-notes/version-2.6.md
@@ -4,6 +4,7 @@
 
 * [#2050](https://github.com/netbox-community/netbox/issues/2050) - Preview image attachments when hovering the link
 * [#3187](https://github.com/netbox-community/netbox/issues/3187) - Add rack selection field to rack elevations
+* [#3851](https://github.com/netbox-community/netbox/issues/3851) - Allow passing initial data to custom script forms
 
 ## Bug Fixes
 
diff --git a/netbox/extras/scripts.py b/netbox/extras/scripts.py
index 28238b008..4876595a3 100644
--- a/netbox/extras/scripts.py
+++ b/netbox/extras/scripts.py
@@ -263,12 +263,12 @@ class BaseScript:
     def run(self, data):
         raise NotImplementedError("The script must define a run() method.")
 
-    def as_form(self, data=None, files=None):
+    def as_form(self, data=None, files=None, initial=None):
         """
         Return a Django form suitable for populating the context data required to run this Script.
         """
         vars = self._get_vars()
-        form = ScriptForm(vars, data, files, commit_default=getattr(self.Meta, 'commit_default', True))
+        form = ScriptForm(vars, data, files, initial=initial, commit_default=getattr(self.Meta, 'commit_default', True))
 
         return form
 
diff --git a/netbox/extras/views.py b/netbox/extras/views.py
index eb17a65ab..b9ef7f9b4 100644
--- a/netbox/extras/views.py
+++ b/netbox/extras/views.py
@@ -392,7 +392,7 @@ class ScriptView(PermissionRequiredMixin, View):
     def get(self, request, module, name):
 
         script = self._get_script(module, name)
-        form = script.as_form()
+        form = script.as_form(initial=request.GET)
 
         return render(request, 'extras/script.html', {
             'module': module,