CVE-2026-48527

HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint

State: Published
Severity: 8.7 High
Published: May 29, 2026
Updated: May 29, 2026
Reserved: May 21, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.7 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
haxcms-nodejshaxtheweb	< 26.0.1Affected
haxcms-phphaxtheweb	< 26.0.2Affected

References

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

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