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--- a/htmlpurifier-4.10.0/smoketests/variableWidthAttack.php
+++ b/htmlpurifier-4.10.0/smoketests/variableWidthAttack.php
@ -0,0 +1,57 @@
+<?php
+
+require_once 'common.php';
+
+echo '<?xml version="1.0" encoding="UTF-8" ?>';
+?><!DOCTYPE html
+     PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html>
+<head>
+    <title>HTML Purifier Variable Width Attack Smoketest</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+<h1>HTML Purifier Variable Width Attack Smoketest</h1>
+<p>For more information, see
+<a href="http://applesoup.googlepages.com/bypass_filter.txt">Cheng Peng Su's
+original advisory.</a>  This particular exploit code appears only to work
+in Internet Explorer, if it works at all.</p>
+<h2>Test</h2>
+<?php
+
+$purifier = new HTMLPurifier();
+
+?>
+<table>
+<thead><tr><th>ASCII</th><th width="30%">Raw</th><th>Output</th><th>Render</th></tr></thead>
+<tbody>
+<?php
+
+for ($i = 0; $i < 256; $i++) {
+    $c = chr($i);
+    $html = '<img src="" alt="X' . $c . '"';
+    $html .= '>A"'; // in our out the attribute? ;-)
+    $html .= "onerror=alert('$i')>O";
+    $pure_html = $purifier->purify($html);
+?>
+<tr>
+    <td><?php echo $i; ?></td>
+    <td style="font-size:8pt;"><?php echo escapeHTML($html); ?></td>
+    <td style="font-size:8pt;"><?php echo escapeHTML($pure_html); ?></td>
+    <td><?php echo $pure_html; ?></td>
+</tr>
+<?php } ?>
+</tbody>
+</table>
+
+<h2>Analysis</h2>
+
+<p>By making sure that UTF-8 is well formed and non-SGML codepoints are
+removed, as well as escaping quotes outside of tags, this is a non-threat.</p>
+
+</body>
+</html>
+<?php
+
+// vim: et sw=4 sts=4