# CVE-2026-46511

## Summary

- **CVE ID:** CVE-2026-46511
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-79, CWE-522, CWE-922
- **Published:** Jun 5, 2026
- **Last Modified:** Jun 8, 2026

## 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.

## Affected Products

- haxtheweb — haxcms-nodejs (< 26.0.0)
- haxtheweb — haxcms-php (< 26.0.0)

## References

- [CNA](https://github.com/haxtheweb/issues/security/advisories/GHSA-x3x5-7h4h-gwxg)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 19.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._