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 Bulk Delete Users by Email WordPress plugin through 1.2 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting

The Bulk Delete Users by Email WordPress plugin through 1.2 does not have CSRF check when deleting users, which could allow attackers to make a logged in admin delete non admin users by knowing their email via a CSRF attack