{
"id": "GHSA-jh3h-rpxg-fr36",
"aliases": [
"CVE-2026-46396"
],
"details": "### Summary\nA stored cross-site scripting (XSS) vulnerability exists in HAX CMS due to improper sanitization of `<iframe>` elements.\n\nThe application allows `javascript:` URIs in the `src` attribute, which are executed when a malicious page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data exposed to client-side scripts.\n\n### Details\nSuccessful exploitation allows access to any data available in the browser context, including:\n\n- Authentication tokens (e.g., JWT)\n- Session cookies (if not protected with HttpOnly)\n- Application configuration (e.g., window.appSettings)\n- User-specific data accessible via APIs\n\nThis significantly increases the impact beyond simple script execution.\n\n### PoC\nSteps to reproduce:\n\n1. Log in to HAX CMS as any authenticated user.\n2. Create a new page or edit an existing page.\n3. Open the HTML source editor (`<>`).\n4. Insert the following payload:\n\n```html\n<iframe srcdoc=\"<script>\n (function(){\n try {\n var jwt = parent.window.appSettings.jwt;\n alert('Stolen JWT:\\n' + jwt);\n } catch(e) {\n alert('Error: ' + e.message);\n }\n })();\n</script>\" style=\"display:none\" sandbox=\"allow-scripts allow-same-origin\"></iframe>\n```\n<img width=\"2446\" height=\"1319\" alt=\"image\" src=\"https://github.com/user-attachments/assets/daea3b41-8c72-4f6c-ab32-34c688bbd251\" />\n\n\n<img width=\"2464\" height=\"1397\" alt=\"image\" src=\"https://github.com/user-attachments/assets/911cbd42-db50-454a-b178-51555e0db79c\" />\n\n\n\n<img width=\"2466\" height=\"1409\" alt=\"webhook`\" src=\"https://github.com/user-attachments/assets/8a286435-98f4-418c-a596-d0c19556696a\" />\n\n### Impact\nThis vulnerability allows stored XSS leading to:\n\n- Execution of arbitrary JavaScript in victim browsers\n- Access to sensitive client-side data, including authentication tokens and session identifiers\n- Unauthorized API actions performed on behalf of the victim\n- Session hijacking and full account takeover\n\nBecause the application exposes authentication data in the client-side environment, exploitation of this vulnerability can lead to complete compromise of user accounts and site content.",
"summary": "Stored XSS via <iframe> in HAX CMS allows access to sensitive client-side data and account takeover",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.0.0"
}
]
}
],
"package": {
"name": "@haxtheweb/haxcms-nodejs",
"ecosystem": "npm"
},
"database_specific": {
"last_known_affected_version_range": "<= 25.0.0"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.0.0"
}
]
}
],
"package": {
"name": "@haxtheweb/video-player",
"ecosystem": "npm"
},
"database_specific": {
"last_known_affected_version_range": "<= 25.0.0"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.0.0"
}
]
}
],
"package": {
"name": "@haxtheweb/iframe-loader",
"ecosystem": "npm"
},
"database_specific": {
"last_known_affected_version_range": "<= 25.0.0"
}
}
],
"modified": "2026-06-09T11:56:54Z",
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
}
],
"published": "2026-05-19T14:46:47Z",
"references": [
{
"url": "https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46396",
"type": "ADVISORY"
},
{
"url": "https://github.com/haxtheweb/issues",
"type": "PACKAGE"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-06-05T19:16:33Z",
"github_reviewed_at": "2026-05-19T14:46:47Z"
}
}