The The InPost Gallery plugin for WordPress is vulnerable to arbitrary shortcode execution via the inpost_gallery_get_shortcode_template AJAX action in all versions up to, and including, 2.1.4.2. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with Subscriber-level access and above, to execute arbitrary shortcodes.

The InPost Gallery WordPress plugin, in versions < 2.2.2, is affected by a reflected cross-site scripting vulnerability in the 'imgurl' parameter to the add_inpost_gallery_slide_item action, which can only be triggered by an authenticated user.

The InPost Gallery WordPress plugin before 2.1.4.1 insecurely uses PHP's extract() function when rendering HTML views, allowing attackers to force the inclusion of malicious files & URLs, which may enable them to run code on servers.