dxbjavid opened a new pull request, #749:
URL: https://github.com/apache/commons-text/pull/749
UrlDecoderStringLookup.lookup only catches UnsupportedEncodingException, so
a malformed percent-escape like ${urlDecoder:%} lets URLDecoder.decode throw
IllegalArgumentException straight out of StringSubstitutor.replace on the
default interpolator. The sibling decoder lookups already swallow that:
FunctionStringLookup catches IllegalArgumentException and returns null, so
${base64Decoder:!} just resolves to nothing. Catch it here too and return null
so malformed untrusted input decodes consistently.
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