CVE-2026-46396

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

State: Published
Severity: 9.3 Critical
Published: Jun 5, 2026
Updated: Jun 9, 2026
Reserved: May 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	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	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
haxcms-nodejshaxtheweb	< 26.0.0Affected
video-playerhaxtheweb	< 26.0.0Affected
iframe-loaderhaxtheweb	< 26.0.0Affected

References

https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36

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