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Simulations/XXE Injection

XXE Injection

Intermediate

XML External Entity (XXE) injection exploits XML parsers that process external entity references. Submit crafted XML payloads to read server files, then enable secure parsing to block the attack.

Progress:
1
Read a Local File
2
Block XXE with Secure Parsing
XML Input
Parser Configuration
Request log — POST /api/parse-xml
Waiting for XML submission…

Challenges

1
Read a Local File
Submit an XML payload with an external entity that reads file:///etc/passwd. Watch the server return the file contents.
▼ hints
2
Block XXE with Secure Parsing
Enable the 'Disable DTD' toggle and resubmit the same payload. The parser should reject it.
▼ hints
How to prevent XXE Injection
Disable DTDs, use safe parsers, and validate input
▼

Frequently Asked Questions