picoCTF SSTI1 Writeup | Jinja2 SSTI ➝ RCE (Beginner-Friendly)

Описание: Learn how to solve the picoCTF 2025 SSTI1 challenge step-by-step!
In this walkthrough, I show how a simple input field on a website leads to a Server-Side Template Injection (SSTI) vulnerability using Jinja2, and how it can escalate into SSGI / Server-Side Code Execution.

🔍 What you'll learn:

How SSTI works

Detecting Jinja2 template injection

Payload crafting

Moving from simple testing to full code execution

Getting the picoCTF flag safely

Perfect for beginners entering web exploitation, CTFs, or bug bounty.

📌 Challenge: SSTI1 – picoCTF 2025
📌 Difficulty: Easy
📌 Tech: Jinja2, Python, SSTI, SSGI

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#picoCTF #CTF #CyberSecurity #EthicalHacking #BugBounty #SSTI #Jinja2 #WebExploitation #HackTheBox #TryHackMe #CyberSecurityForBeginners #CaptureTheFlag #WebHacking