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https://issues.apache.org/jira/browse/SLING-7703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konrad Windszus updated SLING-7703:
-----------------------------------
Attachment: (was: SLING-7703-v01.patch)
> XSSFilter.filter(XSSFilter.DEFAULT_CONTEXT, ...) unescapes given unicode
> escape sequences
> -----------------------------------------------------------------------------------------
>
> Key: SLING-7703
> URL: https://issues.apache.org/jira/browse/SLING-7703
> Project: Sling
> Issue Type: Bug
> Components: XSS Protection API
> Affects Versions: XSS Protection API 2.0.6
> Reporter: Konrad Windszus
> Priority: Major
> Attachments: SLING-7703-v02.patch
>
>
> When giving a unicode escape sequence like
> {code}
> test ✅ test
> {code}
> to {{XSSFilter.filter(...)}} the returned value contains the unescaped
> unicode escape sequence.
> This is always a problem if the output is not UTF-8.
> And even worse
> {code}
> test­test
> {code}
> leads to the full removal of the semantically significant soft-hyphen.
> The expected behaviour is that those non-dangerous unicode escape sequences
> as well as non-dangerous html escapes pass the filter without getting
> unescaped/removed.
> {{XSSFilter.filter(...)}} is used e.g. from HTL with display context "html"
> (https://github.com/apache/sling-org-apache-sling-scripting-sightly/blob/f46ff4d97b96d21da521651fe9f789f89253452f/src/main/java/org/apache/sling/scripting/sightly/impl/engine/extension/XSSRuntimeExtension.java#L123)
> Attached is a failing test case.
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