The article details how the author exploited a file upload vulnerability to gain unauthorized access to a server hosting 40 websites. By uploading a malicious PHP file, they obtained a shell, allowing them to read sensitive data, including design files, invoices, and Wi-Fi credentials. Further exploration revealed open SMB ports, exposing additional confidential information. Ultimately, the author escalated privileges to root by exploiting an unpatched kernel vulnerability, demonstrating the critical importance of regular security updates. This insightful article effectively highlights common security flaws and underscores the necessity of proactive cybersecurity measures.