Social Feed Gallery Portfolio <= 1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'id' Shortcode Attribute

The Social Feed Gallery Portfolio plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' parameter of the [igp-wp] shortcode in all versions up to, and including, 1.3 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.