prevent xss javascript injection through facet values #151
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We recently noticed a xss attempt using the following url:
solr-search?q=&facet=itemtype:%22New%3Cimg%20src=x%20onerror=alert(document.domain)%3E%22They used inline javascript in a img-tag in the facet part of the query url.
These facet values aren't sanitized at the moment and are being displayed here:
https://github.com/biblibre/omeka-plugin-SolrSearch/blob/bf1e4b2403d1d998854427e31ebc73ecc7e4d9e4/views/shared/results/index.php#L45
This pr adds adds htmlspecialchars and strip_tags to sanitize the facet values in the function parseFacets