ACP2E-3867: Missing validation for Catalog Price rule discount amount field

Author: arnobsh

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -660,12 +660,18 @@ define([
         ],
         'validate-number-range': [
             function (value, param) {
-                var numValue, dataAttrRange, result, range, m;
+                var numValue, isNumeric, dataAttrRange, result, range, m;
 
                 if (utils.isEmptyNoTrim(value)) {
                     return true;
                 }
 
+                isNumeric = /^(?:\d+\.?\d*|\.\d+)$/.test(value);
+
+                if (!isNumeric) {
+                    return false;
+                }
+
                 numValue = utils.parseNumber(value);
 
                 if (isNaN(numValue)) {