Add missing value validation in `TSelectionFormField`

See #2509

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/TSelectionFormField.class.php b/wcfsetup/install/files/lib/system/form/builder/field/TSelectionFormField.class.php
index 3487cdbbb8ba97946bb5a4c1f4490cdae4ba578f..24d13501cd83d09b93aae7b64353df2adb0cecab 100644 (file)
--- a/wcfsetup/install/files/lib/system/form/builder/field/TSelectionFormField.class.php
+++ b/wcfsetup/install/files/lib/system/form/builder/field/TSelectionFormField.class.php
@@ -149,4 +149,15 @@ trait TSelectionFormField {
                
                parent::validate();
        }
+       
+       /**
+        * @inheritDoc
+        */
+       public function value($value): IFormField {
+               if (!in_array($value, $this->possibleValues)) {
+                       throw new \InvalidArgumentException("Unknown value '{$value}'");
+               }
+               
+               return parent::value($value);
+       }
 }