diff --git a/includes/admin/importers/class-wc-product-csv-importer-controller.php b/includes/admin/importers/class-wc-product-csv-importer-controller.php
index 52f6d4275a5..99abc461769 100644
--- a/includes/admin/importers/class-wc-product-csv-importer-controller.php
+++ b/includes/admin/importers/class-wc-product-csv-importer-controller.php
@@ -329,6 +329,13 @@ class WC_Product_CSV_Importer_Controller {
 			}
 
 			return ABSPATH . $file_url;
+		} elseif ( file_exists( $file_url ) ) {
+			$filetype = wp_check_filetype( $file_url, $valid_filetypes );
+			if ( ! in_array( $filetype['type'], $valid_filetypes, true ) ) {
+				return new WP_Error( 'woocommerce_product_csv_importer_upload_file_invalid', __( 'Invalid file type. The importer supports CSV and TXT file formats.', 'woocommerce' ) );
+			}
+
+			return $file_url;
 		}
 		// phpcs:enable