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 Float menu WordPress plugin before 5.0.2, Bubble Menu WordPress plugin before 3.0.4, Button Generator WordPress plugin before 2.3.5, Calculator Builder WordPress plugin before 1.5.1, Counter Box WordPress plugin before 1.2.2, Floating Button WordPress plugin before 5.3.1, Herd Effects WordPress plugin before 5.2.2, Popup Box WordPress plugin before 2.2.2, Side Menu Lite WordPress plugin before 4.0.2, Sticky Buttons WordPress plugin before 3.1.1, Wow Skype Buttons WordPress plugin before 4.0.2, WP Coder WordPress plugin before 2.5.6 do not escape the page parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The WP Sticky Button WordPress plugin before 1.4.1 does not have authorisation and CSRF checks when saving its settings, allowing unauthenticated users to update them. Furthermore, due to the lack of escaping in some of them, it could lead to Stored Cross-Site Scripting issues