What’s Vulnerable › Vulnerabilities

CVE-2026-46396: HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-05 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• haxtheweb haxcms-nodejs: before 26.0.0
• haxtheweb iframe-loader: before 26.0.0
• haxtheweb video-player: before 26.0.0

References

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

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