XML External Entity

Definitions

1. An XML parser feature that can fetch external resources and becomes dangerous when untrusted input is processed. It shows up in application security, identity, infrastructure, or incident response work depending on the environment. Teams use the concept to prevent abuse, detect adversary activity earlier, or define stronger control boundaries during engineering, testing, and operations.

   In plain English: XML External Entity is the practical security idea behind a control, weakness, or safeguard. It matters because it changes how attackers succeed or defenders reduce risk.

   Example: "During the review, the team focused on XML External Entity after telemetry and testing showed it was the fastest way to reduce exposure, tighten controls, and close a realistic attack path before the next production release."

Related Terms

• Application Security
• Black Box Testing
• Burp Suite
• Business Logic Vulnerability
• CAPTCHA Bypass
• Code Injection
• Cookie Poisoning
• XXE Attack
• XSLT