[jira] [Created] (LANG-757) StringEscapeUtils.unescapeHtml: handle HTML escapes without semicolon

[Steve Hale (JIRA)]

StringEscapeUtils.unescapeHtml: handle HTML escapes without semicolon
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                 Key: LANG-757
                 URL: https://issues.apache.org/jira/browse/LANG-757
             Project: Commons Lang
          Issue Type: Improvement
          Components: lang.*
    Affects Versions: 2.x
            Reporter: Steve Hale
            Priority: Minor


org.apache.commons.lang.StringEscapeUtils.unescapeHtml is useful in detecting 
and correcting Cross-Site Scripting (XSS) attempts by converting escaped chars 
like &# 60; or & lt; (remove spaces) into normal chars like < so patterns like 
HTML tags can be detected.  Many browsers will allow variations without 
semicolons, particularly the long UTF-8 encoding like &#0000060.  Please see: 
http://ha.ckers.org/xss.html

Since this may not be standard HTML, maybe adding a boolean bLenient parameter 
to the method could allow better backward compatibility.

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