Input validation vulnerability in RDFa Breadcrumb 2.3

The RDFa Breadcrumb tool used in WordPress has a security issue in versions 2.3 and below. This is because it does not properly clean or protect against harmful codes. As a result, someone with administrator-level access or higher can add their own harmful code to a page. This will then activate whenever someone visits that page. This only affects WordPress sites with multiple pages or sites that have disabled a certain security feature.