How I Explored Further and Chained HTTP Request Smuggling with Other Vulnerabilities

After successfully discovering an HTTP Request Smuggling bug in a web application, I realized there’s more to uncover with this vulnerability. While my initial find demonstrated how smuggling requests could bypass server-side protections, I wanted to push the boundaries and see if this technique could be combined with other vulnerabilities to elevate the risk. In this follow-up post, I’ll walk you through how I chained HTTP Request Smuggling with other attack vectors, opening up new possibilities for exploitation.

Building on the Initial Discovery

Once I confirmed the vulnerability, I started thinking about how to leverage HTTP Request Smuggling for a broader attack. In many cases, web vulnerabilities don’t exist in isolation. Instead, they can be combined to achieve a more significant impact. My next step was to look into how this vulnerability could be chained with: