The Ultimate Product Catalog WordPress plugin before 5.2.6 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup)

The Ultimate Product Catalog WordPress plugin before 5.0.26 does not have authorisation and CSRF checks in some AJAX actions, which could allow any authenticated users, such as subscriber to call them and add arbitrary products, or change the plugin's settings for example