Input validation vulnerability in Don't Muck My Markup 1.8

The plugin called “Don’t Muck My Markup” for WordPress has a security issue that affects all versions up to 1.8. This is because it does not properly check for a special code to prevent unauthorized requests from being made. As a result, people who are not logged into the website can trick the person in charge of the website into doing something they are not supposed to do, like clicking on a harmful link.