Introduction Index Alphabetical Index ASVS Index MASVS Index Proactive Controls Index Top 10 Cheatsheets XML External Entity Prevention Cheat Sheet¶ Introduction¶ An XML eXternal Entity injection (XXE), which is now part of the OWASP Top 10 via the point A4, is attack against applications that parse XML input. This issue is referenced in the ID 611 in the Common Weakness Enumeration referential. A