The Font Awesome WordPress plugin before 4.3.2 does not validate and escapes some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as a contributor to perform Stored Cross-Site Scripting attacks against logged-in admins.
The Material Design Iconic Font Integration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'mdiconic' shortcode in all versions up to, and including, 2 due to insufficient input sanitization and output escaping on user supplied attributes. 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.