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Create a simple PHP script named exploit.php on your server to handle incoming automated queries and issue a location header response:

Server-Side Request Forgery (SSRF) & Local File Inclusion (LFI) Target Binary Component: wkhtmltopdf 1. Initial Reconnaissance & Enumeration

Once we determine that the application is blindly executing inputs, or rendering external content without sanitization, it is time to craft our payload. The Mechanism of the Exploit

Create an exploit.php file on your controlled server or public URL provider:

Understanding how improper sanitization leads to .

<!DOCTYPE html> <html> <body> <object data="file:///etc/passwd" width="100%" height="800px"></object> </body> </html>

The script transmits a JSON payload to the /api/cache endpoint. The server stores the resulting document in /static/pdfs/ using a uniquely generated filename. 3. Probing for Local SSRF Filters

The core functionality—fetching a remote URL and rendering it—is a textbook indicator for potential .

When you launch the Hack The Box lab instance, you are met with a simple, clean user interface. The core functionality relies on a single input box asking for a URL. Analyzing the Client-Side Behavior

When you input a standard website (e.g., http://google.com ), the application processes the request for a few seconds and then returns a PDF document showing a rendered snapshot of the Google homepage. Phase 2: Vulnerability Analysis (SSRF Discovery)

This journey through Pdfy serves as a classic reminder: never trust user-supplied URLs, and always assume that if your server can see it, an attacker can too.

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Pdfy Htb Writeup Upd !!exclusive!! Jun 2026

Create a simple PHP script named exploit.php on your server to handle incoming automated queries and issue a location header response:

Server-Side Request Forgery (SSRF) & Local File Inclusion (LFI) Target Binary Component: wkhtmltopdf 1. Initial Reconnaissance & Enumeration

Once we determine that the application is blindly executing inputs, or rendering external content without sanitization, it is time to craft our payload. The Mechanism of the Exploit pdfy htb writeup upd

Create an exploit.php file on your controlled server or public URL provider:

Understanding how improper sanitization leads to . Create a simple PHP script named exploit

<!DOCTYPE html> <html> <body> <object data="file:///etc/passwd" width="100%" height="800px"></object> </body> </html>

The script transmits a JSON payload to the /api/cache endpoint. The server stores the resulting document in /static/pdfs/ using a uniquely generated filename. 3. Probing for Local SSRF Filters an attacker can too.

The core functionality—fetching a remote URL and rendering it—is a textbook indicator for potential .

When you launch the Hack The Box lab instance, you are met with a simple, clean user interface. The core functionality relies on a single input box asking for a URL. Analyzing the Client-Side Behavior

When you input a standard website (e.g., http://google.com ), the application processes the request for a few seconds and then returns a PDF document showing a rendered snapshot of the Google homepage. Phase 2: Vulnerability Analysis (SSRF Discovery)

This journey through Pdfy serves as a classic reminder: never trust user-supplied URLs, and always assume that if your server can see it, an attacker can too.