CVE-2026-48527

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

Published May 29, 2026 CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-g2g8-95qg-v35h HaxCMS has a stored Cross-Site Scripting (XSS) bypass in its saveNode endpoint
History
Type Values Removed Values Added
First Time appeared Haxtheweb
Haxtheweb haxcms-nodejs
Haxtheweb haxcms-php
Vendors & Products Haxtheweb
Haxtheweb haxcms-nodejs
Haxtheweb haxcms-php
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 29, 2026, 1:02 PM
Reserved
May 21, 2026, 4:18 PM
Status
Deferred
Published
May 29, 2026, 1:16 PM
Modified
Jul 21, 2026, 12:10 PM