Pdfy Htb Writeup Upd [cracked] -

This is a known command-line tool that uses the WebKit rendering engine to convert HTML to PDF. Crucially, older versions of this tool are vulnerable to SSRF because they follow redirects and execute JavaScript.

Entering a standard URL like http://google.com confirms the functionality—the application fetches the page and returns a PDF version of it. pdfy htb writeup upd

You need a way to serve a 302 Redirect . You can use a simple PHP script or a Python server to achieve this. Use code with caution. Step B: Expose Your Server This is a known command-line tool that uses

The wkhtmltopdf engine follows the redirect and reads the local file. The content of /etc/passwd is rendered into the PDF. You need a way to serve a 302 Redirect

Always validate and sanitize user-provided URLs. Blacklisting "localhost" or "file://" is rarely sufficient, as redirects can often bypass these filters.

If the application can fetch external web pages, can it fetch internal resources? Inputting file:///etc/passwd or http://localhost directly often results in a "URL not allowed" or similar error message, indicating a basic blacklist or security filter is in place. 2. Identifying the Technology