diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index 0f0bdcd81e..0822110772 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -10,6 +10,7 @@
 - Fix: [#13334] Uninitialised variables in CustomTabDesc.
 - Fix: [#13342] Rename tabChange to onTabChange in WindowDesc interface.
 - Fix: [#13427] Newly created Go-Karts show "Race won by <blank>".
+- Fix: [#13431] [Plugin] UI disabled widgets can still be interacted with.
 - Fix: [#13454] Plug-ins do not load on Windows if the user directory contains non-ASCII characters.
 - Fix: [#13469] Exception thrown from plugin in context.subscribe.
 - Fix: [#13477] Plug-in widget tooltips do not work.
diff --git a/src/openrct2-ui/interface/Widget.cpp b/src/openrct2-ui/interface/Widget.cpp
index ed0f14e109..9dffee73f8 100644
--- a/src/openrct2-ui/interface/Widget.cpp
+++ b/src/openrct2-ui/interface/Widget.cpp
@@ -1014,6 +1014,18 @@ void WidgetSetEnabled(rct_window* w, rct_widgetindex widgetIndex, bool enabled)
     }
 }
 
+void WidgetSetDisabled(rct_window* w, rct_widgetindex widgetIndex, bool value)
+{
+    if (value)
+    {
+        w->disabled_widgets |= (1ULL << widgetIndex);
+    }
+    else
+    {
+        w->disabled_widgets &= ~(1ULL << widgetIndex);
+    }
+}
+
 void WidgetSetCheckboxValue(rct_window* w, rct_widgetindex widgetIndex, int32_t value)
 {
     if (value)
diff --git a/src/openrct2-ui/scripting/CustomWindow.cpp b/src/openrct2-ui/scripting/CustomWindow.cpp
index 3b24fc15b7..4ee5097111 100644
--- a/src/openrct2-ui/scripting/CustomWindow.cpp
+++ b/src/openrct2-ui/scripting/CustomWindow.cpp
@@ -871,6 +871,8 @@ namespace OpenRCT2::Ui::Windows
             widget.text = STR_DROPDOWN_GLYPH;
             widget.tooltip = STR_NONE;
             widget.flags |= WIDGET_FLAGS::IS_ENABLED;
+            if (desc.IsDisabled)
+                widget.flags |= WIDGET_FLAGS::IS_DISABLED;
             widgetList.push_back(widget);
         }
         else if (desc.Type == "groupbox")
@@ -917,6 +919,8 @@ namespace OpenRCT2::Ui::Windows
             widget.text = STR_NUMERIC_DOWN;
             widget.tooltip = STR_NONE;
             widget.flags |= WIDGET_FLAGS::IS_ENABLED;
+            if (desc.IsDisabled)
+                widget.flags |= WIDGET_FLAGS::IS_DISABLED;
             widgetList.push_back(widget);
 
             // Add the increment button
diff --git a/src/openrct2-ui/scripting/ScWidget.hpp b/src/openrct2-ui/scripting/ScWidget.hpp
index 50a875b02c..c151f6798e 100644
--- a/src/openrct2-ui/scripting/ScWidget.hpp
+++ b/src/openrct2-ui/scripting/ScWidget.hpp
@@ -299,11 +299,21 @@ namespace OpenRCT2::Scripting
             auto w = GetWindow();
             if (w != nullptr)
             {
-                auto mask = 1ULL << _widgetIndex;
-                if (value)
-                    w->disabled_widgets |= mask;
-                else
-                    w->disabled_widgets &= ~mask;
+                WidgetSetDisabled(w, _widgetIndex, value);
+
+                auto widget = GetWidget();
+                if (widget != nullptr)
+                {
+                    if (widget->type == WindowWidgetType::DropdownMenu)
+                    {
+                        WidgetSetDisabled(w, _widgetIndex + 1, value);
+                    }
+                    else if (widget->type == WindowWidgetType::Spinner)
+                    {
+                        WidgetSetDisabled(w, _widgetIndex + 1, value);
+                        WidgetSetDisabled(w, _widgetIndex + 2, value);
+                    }
+                }
             }
         }
 
diff --git a/src/openrct2/interface/Widget.h b/src/openrct2/interface/Widget.h
index 252fec04a6..7bb87829f9 100644
--- a/src/openrct2/interface/Widget.h
+++ b/src/openrct2/interface/Widget.h
@@ -145,6 +145,7 @@ void WidgetScrollGetPart(
     int32_t* output_scroll_area, int32_t* scroll_id);
 
 void WidgetSetEnabled(rct_window* w, rct_widgetindex widgetIndex, bool enabled);
+void WidgetSetDisabled(rct_window* w, rct_widgetindex widgetIndex, bool value);
 void WidgetSetCheckboxValue(rct_window* w, rct_widgetindex widgetIndex, int32_t value);
 
 #endif