The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

The Newsletter Popup WordPress plugin through 1.2 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 unfiltered_html capability is disallowed (for example in multisite setup)

The Newsletter Popup WordPress plugin through 1.2 does not have CSRF check when deleting list, which could allow attackers to make logged in admins perform such action via a CSRF attack

The Newsletter Popup WordPress plugin through 1.2 does not have CSRF check when deleting subscriber, which could allow attackers to make logged in admins perform such action via a CSRF attack

The Newsletter Popup WordPress plugin through 1.2 does not sanitise and escape some parameters, which could allow unauthenticated visitors to perform Cross-Site Scripting attacks against admins

The Newsletter Popup WordPress plugin through 1.2 does not have CSRF checks in some places, which could allow attackers to make logged in users perform unwanted actions via CSRF attacks as the wp_newsletter_show_localrecord page is not protected with a nonce.

The Newsletter Popup WordPress plugin through 1.2 does not sanitise and escape some of its settings, which could allow unauthenticated users to perform Stored Cross-Site Scripting attacks

Prestashop advancedpopupcreator v1.1.21 to v1.1.24 was discovered to contain a SQL injection vulnerability via the component AdvancedPopup::getPopups().

OpenCart 3.x Newsletter Custom Popup was discovered to contain a SQL injection vulnerability via the email parameter at index.php?route=extension/module/so_newletter_custom_popup/newsletter.

The Simple Popup Newsletter WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/simple-popup-newsletter.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.7.