The Icegram Express WordPress plugin before 5.8.6 does not properly escape a list description setting before outputting it within an HTML attribute, which could allow users with the Administrator role and above to perform Stored Cross-Site Scripting attacks.

The Email Subscribers by Icegram Express WordPress plugin before 5.7.45 does not sanitise and escape some of its Text Block options, 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 Email Subscribers by Icegram Express – Email Marketing, Newsletters, Automation for WordPress & WooCommerce plugin for WordPress is vulnerable to SQL Injection via the 'run' function of the 'IGESSubscribersQuery' class in all versions up to, and including, 5.7.14 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.