Description: XML External Entity (XXE) is a type of security vulnerability that affects applications processing XML data. This attack occurs when an application allows the inclusion of external entities in its XML parsing, potentially leading to unauthorized disclosure of internal files and other sensitive data. Exploiting XXE can result in exposure of critical information, such as credentials, configuration files, and other data that should remain protected. Additionally, this type of attack can be used to perform denial of service (DoS) attacks or even execute malicious code on the server. The nature of XML, which allows the definition of external entities, makes applications that do not properly implement validation and handling of these entities particularly vulnerable. In a zero-trust environment, where it is assumed that no entity is completely trustworthy, protection against XXE becomes crucial, especially in applications deployed in cloud environments where sensitive data may be more exposed. Therefore, it is essential for developers and system administrators to understand the security implications of XXE and adopt appropriate measures to mitigate this risk.
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