Input validation vulnerability in Serious Slider 1.2.4

The Serious Slider plugin for WordPress has a security issue called Cross-Site Request Forgery. This affects all versions up to and including 1.2.4. The problem is caused by a function that does not properly check for a special code called a nonce. This allows someone without an account to make the website do something it shouldn’t, as long as they can trick someone with access to the website into clicking on a link.