Pdfy Htb Writeup Upd May 2026
Now for the Root Proof Data (RPD). PDFY has a known escalation vector: pdftex with shell escape enabled.
After executing the pdftex exploit:
cat /root/root.txt
Example RPD format:
HTBr00t_pr00f_d4t4_456abc pdfy htb writeup upd
User flag: b1e4c5f7a9d2e8f3c6a0b1d4e7f9a2c3
Root flag: f2a3d8c9e1b5f7a4d6c0b2e8f9a1c3d4 Now for the Root Proof Data (RPD)
| Flag Type | Location | Method |
|-----------|----------|--------|
| UPD (User Proof Data) | /home/robert/user.txt | LFI via SSRF in PDF generator |
| RPD (Root Proof Data) | /root/root.txt | pdftex with -shell-escape sudo misconfiguration | Example RPD format:
HTBr00t_pr00f_d4t4_456abc
The critical vulnerability in this scenario lies in how the PDF generator renders the input.
file:// protocol, attackers can read the source code of the web application (e.g., file:///var/www/html/app.py). This reveals the libraries used and potential logic flaws.