Gravity Forms is a WordPress forms plugin that has had some known security issues in the past. However, it is important to note that most security issues in plugins can be fixed through security updates and patches. It is likely that Gravity Forms has fixed known security flaws through updates and security patches.
It is important to stay on top of security updates to ensure that your site is protected against known bugs. If you use Gravity Forms, make sure you have the latest version of the plugin installed and keep it up to date to protect your site. It is also advisable to use strong passwords and enable two-step authentication to protect access to your site.
It is difficult to determine how many sites were affected by each individual security breach, as this information is often not publicly disclosed. In some cases, it can be difficult to determine the extent of a security breach and it can take a long time before the true impact is known.
It is important to note that while a security breach can affect a large number of sites, it is possible to protect your site by taking appropriate security measures, such as keeping everything up to date, using strong passwords and enabling two-step authentication. By taking these steps, you can minimize the risk of a security breach on your site.