diff --git a/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages.properties b/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages.properties
index 899bfdba7..c8973f75b 100644
--- a/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages.properties
+++ b/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages.properties
@@ -714,6 +714,8 @@ createEntry.labelChooseGalleryImage=Image gallery
 createEntry.labelIllustrationPicture=Illustration picture
 createEntry.labelIllustrationPictureHelp=Upload an image in JPG or PNG format.
 
+createEntry.warning.upload.inprogress=Upload in progress. Please wait...
+
 createEntry.defaultTodayDate=Default date set to current day
 createEntry.labelDisableQuestion=Disable question
 createEntry.labelDisableQuestionHelp=If checked, the question will no longer be visible when filling a form in BO or FO. If responses have already been entered in this question, the answers will still be visible in the answer summary
diff --git a/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages_fr.properties b/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages_fr.properties
index 5be387425..b040a954b 100644
--- a/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages_fr.properties
+++ b/src/java/fr/paris/lutece/plugins/forms/resources/forms_messages_fr.properties
@@ -717,6 +717,8 @@ createEntry.labelChooseGalleryImage=Galerie image
 createEntry.labelIllustrationPicture=Image d'illustration
 createEntry.labelIllustrationPictureHelp=Charger une image au format JPG ou PNG.
 
+createEntry.warning.upload.inprogress=Upload en cours. Merci d'attendre...
+
 createEntry.defaultTodayDate=Date par d\u00e9faut \u00e0 la date du jour
 createEntry.labelDisableQuestion=D\u00e9sactiver la question
 createEntry.labelDisableQuestionHelp=Si coch\u00e9e, la question ne sera plus visible \u00e0 la saisie en BO ou en FO. Si des r\u00e9ponses ont d\u00e9j\u00e0 \u00e9t\u00e9 saisie dans cette question, les r\u00e9ponses seront toujours visibles dans le r\u00e9sum\u00e9 de la r\u00e9ponse.
diff --git a/webapp/WEB-INF/templates/skin/plugins/forms/step_view.html b/webapp/WEB-INF/templates/skin/plugins/forms/step_view.html
index 8e7419027..98e491377 100644
--- a/webapp/WEB-INF/templates/skin/plugins/forms/step_view.html
+++ b/webapp/WEB-INF/templates/skin/plugins/forms/step_view.html
@@ -52,4 +52,28 @@
 	<#if form.countResponses>#i18n{forms.createEntry.manageField.labelFieldNumber}: ${form.currentNumberResponse}</#if>
 	${stepContent!}
 	${formBottomBreadcrumb!}
-</form>
\ No newline at end of file
+</form>
+<div id="upload-info-message" class="alert alert-warning text-center d-none" role="alert">
+	#i18n{forms.createEntry.warning.upload.inprogress}
+</div>
+<script>
+	let isUploading = false;
+
+	$(document).on('fileuploadstart', function () {
+		isUploading = true;
+
+	});
+
+	$(document).on('fileuploadstop', function () {
+		isUploading = false;
+		$('#upload-info-message').addClass('d-none');
+	});
+
+	$('#form-validate').on('submit', function(e) {
+		if (isUploading) {
+			e.preventDefault();
+			$('#upload-info-message').removeClass('d-none');
+		}
+	});
+
+</script>