CVE-2026-48527

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

HIGH
8.7
CVSS Score
Published: May 29, 2026 at 12:26 PM UTC
Updated: July 21, 2026 at 01:39 PM UTC
2 products affected across 1 vendorHaxcms PHPHaxcms Node.js

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Severity
HIGH8.7
Exploit prediction
EPSS 0.2%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 26.0.1
Affected range stops below 26.0.1, so it looks safe — our inference, not a vendor statement
v < 26.0.2
Affected range stops below 26.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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