CVE-2026-46396CWE-79

HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover

Critical · published June 5, 2026

CVSS v4.0
9.3
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The 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. Version 26.0.0 fixes the issue.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
EPSS
0.00390 · 31.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-05T18:44Z
EPSS history
Timeline
  • 05 JUN 18:44Z
    HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover
    cvelistv5