HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored XSS alongside dynamic token exposure in the `/system/api/connectionSettings` endpoint allows an authenticated attacker to perform a complete cross-tenant account takeover. The API dynamically leaks the active session's authentication tokens (including the `jwt`, `user_token`, `site_token`, and `appstore_token`) into a global JavaScript variable (`window.appSettings`). An attacker can exploit the XSS vulnerability to force a victim's browser to silently fetch their specific connection settings, extract the tokens, and exfiltrate them to an attacker-controlled webhook. Version 26.0.0 patches the issue.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-x3x5-7h4h-gwxg HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 05 Jun 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Haxtheweb
Haxtheweb haxcms-nodejs
Haxtheweb haxcms-php
Vendors & Products Haxtheweb
Haxtheweb haxcms-nodejs
Haxtheweb haxcms-php

Fri, 05 Jun 2026 19:00:00 +0000

Type Values Removed Values Added
Description HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored XSS alongside dynamic token exposure in the `/system/api/connectionSettings` endpoint allows an authenticated attacker to perform a complete cross-tenant account takeover. The API dynamically leaks the active session's authentication tokens (including the `jwt`, `user_token`, `site_token`, and `appstore_token`) into a global JavaScript variable (`window.appSettings`). An attacker can exploit the XSS vulnerability to force a victim's browser to silently fetch their specific connection settings, extract the tokens, and exfiltrate them to an attacker-controlled webhook. Version 26.0.0 patches the issue.
Title HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack
Weaknesses CWE-522
CWE-79
CWE-922
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-05T18:32:55.498Z

Reserved: 2026-05-14T19:12:32.754Z

Link: CVE-2026-46511

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-06-05T19:16:34.267

Modified: 2026-06-05T19:20:19.607

Link: CVE-2026-46511

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-05T20:30:03Z

Weaknesses