XXE (Cross-Site X-Ray Elevation) vulnerabilities are a type of security risk that can allow an attacker to access sensitive data on a web application by manipulating XML-based input, such as RSS or Atom feeds. Understanding what XXE vulnerabilities are and how they work is crucial for identifying and mitigating these risks in software development. By recognizing the signs of XXE vulnerabilities and implementing proper security measures, developers can protect their applications from exploitation and prevent sensitive data from being leaked. XXE vulnerabilities are often overlooked due to a lack of awareness or understanding of the technology involved, but with education and awareness, developers can take steps to secure their applications against these types of attacks.