The C9 Blocks plugin for WordPress is vulnerable to Full Path Disclosure in all versions up to, and including, 1.7.7. This is due the plugin containing a publicly accessible composer-setup.php file with error display enabled. This makes it possible for unauthenticated attackers to retrieve the full path of the web application, which can be used to aid other attacks. The information displayed is not useful on its own, and requires another vulnerability to be present for damage to an affected website.

The C9 Admin Dashboard plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.3.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.