See how buttonizer compares to other vendors in security performance
The Button contact VR WordPress plugin through 4.7 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 unfilteredhtml capability is disallowed (for example in multisite setup)
The Smart Floating / Sticky Buttons WordPress plugin before 2.5.5 does not sanitise and escape some parameter before outputting them in attributes and page, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed.