Htb Writeup Upd — Pdfy

💡 Pro-Tip: If you ever struggle to find the exact flag location in similar challenges, keep it simple and start by looting files like /etc/passwd or application source code files to find hardcoded environment variables.

The “UPD” tag is critical. Older versions of the PDFy writeup (from 2020–2021) often missed some nuanced vectors or used deprecated tools. The updated version reviewed here (likely late 2024 or early 2025) reflects: pdfy htb writeup upd

We then focus our attention on the PDF converter service running on port 8080. After analyzing the service using tools like curl and burpsuite , we discover that it allows users to convert various file formats to PDF. However, we also notice that the service does not perform any validation on user-input files, which could potentially lead to code execution vulnerabilities. 💡 Pro-Tip: If you ever struggle to find

Using DirBuster, we perform a directory brute-forcing attack on the web server and discover several directories, including /uploads , /download , and /admin . The /uploads directory seems to be used for storing user-uploaded files, while the /download directory appears to be used for downloading converted PDF files. The updated version reviewed here (likely late 2024