Mastering SSRF | Solving all Portswigger Labs

Server Side Request Forgery(SSRF) is a vulnerability that allows attackers to send requests on behalf of a server, During an SSRF, attackers forge the request signatures of the vulnerable server, allowing them to assume a privileged position on a network, bypass firewall controls, and gain access to internal services. In this writeup, we will exxplore how to find some basic SSRFs and also how to bypass some SSRF protections. LAB 1: Basic SSRF against the local server Objective: This lab has a stock check feature which fetches data from an internal system. To solve the lab, change the stock check URL to access the admin interface at http://localhost/admin. ...

November 2, 2025 · 6 min · Appiah Bismark