The Snow Monkey Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘data-slick' attribute in all versions up to, and including, 24.1.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
https://plugins.trac.wordpress.org/changeset/3519092/
https://plugins.trac.wordpress.org/browser/snow-monkey-blocks/trunk/snow-monkey-blocks.php#L45
https://plugins.trac.wordpress.org/browser/snow-monkey-blocks/trunk/snow-monkey-blocks.php#L228