CVE-2026-46511

CVE-2026-46511 · HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack

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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.

CVSS 8.7 · Élevée · EPSS 0,3% · Correctif disponible

Publication

2026-06-05T18:32:55.498Z

Mise à jour

2026-06-08T15:55:20.156Z

Pile logicielle: node

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