Toxic Hack The Box -

The initial foothold does not have a CVE number. It is a business logic flaw in how the app handles Markdown meta-data. This is the essence of the – finding zero-days in custom code.

Result: The generated PDF contains the contents of /etc/passwd . Success! The PDF renderer is resolving external entities. toxic hack the box

The machine remains a favorite in the HTB community because it mimics a real-world penetration test: no obvious exploits, just misconfigurations and trust assumptions. The initial foothold does not have a CVE number

Many enterprise apps generate invoices or reports as PDFs. If a developer uses a library that resolves XML entities (like older versions of libxml2 ), your entire server can be read. your entire server can be read.