Unescaped HTML in snippets

I often have pieces of code (HTML, XML, etc) in my posts. When Sphinx has a result within these code blocks it outputs corresponding snippets as unescaped HTML. The cosequences may vary from distorted appearance to code injections…

I fixed it by adding htmlspecialchars to snippet generation in file sphinxsearch_frontend.php, function get_excerpt:

$excerpts[$i] = str_replace(
    array('{sphinx_after_match}', '{sphinx_before_match}'),
    array($sphinx_after_match, $sphinx_before_match),
    htmlspecialchars($excerpts[$i]) # <<< HERE!
);

Is it a bug in plugin code or a problem with my theme / other plugins?

https://www.ads-software.com/extend/plugins/wordpress-sphinx-plugin/