The GS Insever Portfolio plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_settings() function in all versions up to, and including, 1.4.5. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update the plugin's CSS settings.

The GS Insever Portfolio WordPress plugin before 1.4.5 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.