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

Quick assessment

Affected
haxtheweb haxcms-nodejs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HAX是HAX The Web开源的一个HAX+CMS使用PHP后端管理的微型网站。 HAX 26.0.0及之前版本存在安全漏洞，该漏洞源于/system/api/saveNode端点存在存储型跨站脚本，具有编辑页面权限的经过身份验证的用户可通过在属性名前注入无空格的事件处理程序属性绕过HTML清理器。

CVSS 8.7 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 2

VendorProduct Version RangeStatus
haxtheweb haxcms-nodejs < 26.0.1 affected
haxtheweb haxcms-php < 26.0.2 affected
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I. Basic Information for CVE-2026-48527

Vulnerability Information
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Vulnerability Title
HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
HAX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HAX是HAX The Web开源的一个HAX+CMS使用PHP后端管理的微型网站。 HAX 26.0.0及之前版本存在安全漏洞，该漏洞源于/system/api/saveNode端点存在存储型跨站脚本，具有编辑页面权限的经过身份验证的用户可通过在属性名前注入无空格的事件处理程序属性绕过HTML清理器。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
haxtheweb haxcms-nodejs < 26.0.1 -
haxtheweb haxcms-php < 26.0.2 -

II. Public POCs for CVE-2026-48527

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5962 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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III. Intelligence Information for CVE-2026-48527

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Vendor Advisories for CVE-2026-48527 (1)

IV. Related Vulnerabilities

Same product: haxcms-nodejs
Same vendor: haxtheweb
Same weakness: CWE-79

V. Comments for CVE-2026-48527

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