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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.

PUBLISHED Reserved 2026-05-21 | Published 2026-05-29 | Updated 2026-05-29 | Assigner GitHub_M




HIGH: 8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem types

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

Product status

< 26.0.1
affected

< 26.0.2
affected

References

github.com/...issues/security/advisories/GHSA-g2g8-95qg-v35h exploit

github.com/...issues/security/advisories/GHSA-g2g8-95qg-v35h

cve.org (CVE-2026-48527)

nvd.nist.gov (CVE-2026-48527)

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