Strapi is an open-source content management system. Prior to version 4.25.2, inputting a local domain into the Webhooks URL field leads to the application fetching itself, resulting in a server side request forgery (SSRF). This issue has been patched in version 4.25.2.

Affected: npm: @strapi/admin

## Description In Strapi latest version, at function Settings -> Webhooks, the application allows us to input a URL in order to create a Webook connection. However, we can input into this field the local domains such as `localhost`, `127.0.0.1`, `0.0.0.0`,.... in order to make the Application fetching into the internal itself, which causes the vulnerability `Server - Side Request Forgery (SSRF)`.

## Payloads - `http://127.0.0.1:80` -> `The Port is not open` - `http://127.0.0.1:1337` -> `The Port which Strapi is running on`

## Steps to Reproduce - First of all, let's input the URL `http://127.0.0.1:80` into the `URL` field, and click "Save".


- Next, use the "Trigger" function and use Burp Suite to capture the request / response


- The server return `request to http://127.0.0.1/ failed, reason: connect ECONNREFUSED 127.0.0.1:80`, BECAUSE the `Port 80` is not open, since we are running Strapi on `Port 1337`, let's change the URL we input above into `http://127.0.0.1:1337`


- Continue to click the "Trigger" function, use Burp to capture the request / response

![CleanShot 2024-06-04 at 22 53 2…

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Strapi ausnutzen, um Informationen offenzulegen.