There was a flaw in the WordPress plugin, Email Subscribers & Newsletters before 4.3.1, that allowed SQL statements to be passed to the database in the hash parameter (a blind SQL injection vulnerability).

The Subscribe2 – Form, Email Subscribers & Newsletters plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ip parameter in all versions up to, and including, 10.43 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Email Subscribers by Icegram Express WordPress plugin before 5.7.45 does not sanitise and escape some of its Workflow settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

The Email Subscribers by Icegram Express WordPress plugin before 5.7.45 does not sanitise and escape some of its form settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

The Email Subscribers by Icegram Express WordPress plugin before 5.7.45 does not sanitise and escape some of form settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

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 unfiltered_html capability is disallowed (for example in multisite setup).

The Email Subscribers by Icegram Express WordPress plugin before 5.7.44 does not sanitize and escape a parameter before using it in a SQL statement, allowing admins to perform SQL injection attacks

The Email Subscribers by Icegram Express – Email Marketing, Newsletters, Automation for WordPress & WooCommerce plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.7.34. 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 Email Subscribers by Icegram Express – Email Marketing, Newsletters, Automation for WordPress & WooCommerce plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'preview_email_template_design' function in all versions up to, and including, 5.7.34. This makes it possible for authenticated attackers, with Subscriber-level access and above, to extract sensitive data including the content of private, password protected, pending, and draft posts and pages.

The Email Subscribers by Icegram Express – Email Marketing, Newsletters, Automation for WordPress & WooCommerce plugin for WordPress is vulnerable to unauthorized API access due to a missing capability check in all versions up to, and including, 5.7.26. This makes it possible for authenticated attackers, with Subscriber-level access and above, to access the API (provided it is enabled) and add, edit, and delete audience users.