diff --git a/sources/Form/Validator/MultipleChoicesValidator.php b/sources/Form/Validator/MultipleChoicesValidator.php
index 33113f1f9..1c34eb6cc 100644
--- a/sources/Form/Validator/MultipleChoicesValidator.php
+++ b/sources/Form/Validator/MultipleChoicesValidator.php
@@ -53,7 +53,8 @@ class MultipleChoicesValidator extends AbstractValidator
     private function CheckValueAgainstChoices(string $sValue, array &$aErrorMessages): void
     {
         if (false === array_key_exists($sValue, $this->aChoices)) {
-            $aErrorMessages[] = "Value ({$sValue}) is not part of the field possible values list";
+	        $sValue = utils::HtmlEntities($sValue);
+	        $aErrorMessages[] = "Value ({$sValue}) is not part of the field possible values list";
         }
     }
 }
\ No newline at end of file
diff --git a/sources/Form/Validator/SelectObjectValidator.php b/sources/Form/Validator/SelectObjectValidator.php
index a4d0c69cd..3794a353e 100644
--- a/sources/Form/Validator/SelectObjectValidator.php
+++ b/sources/Form/Validator/SelectObjectValidator.php
@@ -37,6 +37,7 @@ class SelectObjectValidator extends AbstractValidator
         $iObjectsCount = $oSetForExistingCurrentValue->CountWithLimit(1);
 
         if ($iObjectsCount === 0) {
+			$value = utils::HtmlEntities($value);
             return ["Value $value does not match the corresponding filter set"];
         }