What’s Vulnerable › Vulnerabilities

CVE-2026-48527: HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint

• Severity: high (CVSS 8.7 v3.1)
• 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: 2026-05-29 · updated 2026-07-21
• Weakness: CWE-79

Description

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions up to and including 26.0.0 are affected by a stored cross-site scripting (XSS) vulnerability in the `/system/api/saveNode` endpoint. An authenticated user with a permission to edit pages can bypass the HTML sanitizer by injecting an event handler attribute without whitespace before the attribute name. @haxtheweb/haxcms-nodejs 26.0.1 and haxcms-php 26.0.2 patch the issue.

Affected products

• haxtheweb haxcms-nodejs: before 26.0.1
• haxtheweb haxcms-php: before 26.0.2

References

• https://github.com/haxtheweb/issues/security/advisories/GHSA-g2g8-95qg-v35h
• https://github.com/haxtheweb/issues/security/advisories/GHSA-g2g8-95qg-v35h

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