Input validation vulnerability in Fixed HTML Toolbar 1.0.7

The Fixed HTML Toolbar plugin for WordPress has a security issue that allows attackers to insert harmful code into website pages. This can be done by changing the admin settings, and it affects all versions up to 1.0.7. The plugin does not properly protect against this type of attack, making it possible for someone with high-level access to the site to execute the code whenever a user visits the affected page. This issue only affects websites with multiple sites or where a certain security setting has been turned off.