Day 15 Secure Coding walkthrough // TryHackMe Advent Of Cyber (AoC) 2022

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Insufficient input validation is one of the biggest security concerns for web applications. The issue occurs when user-provided input is inherently trusted by the application. Since user input can also be controlled by an attacker, we can see how this inherent trust can lead to many problems. Several web application vulnerabilities, such as SQL Injection, Cross Site Scripting, and Unrestricted File Upload, stem from the issue of insufficient user input validation. This task will focus on how insufficient input validation can lead to an Unrestricted File Upload vulnerability.

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