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Fencer Intel
high 8.7

CVE-2026-48527 json

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

published 5mo ago modified 2mo ago also EUVD-2026-33286 , GHSA-g2g8-95qg-v35h

cvss
8.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm @haxtheweb/haxcms-nodejs 26.0.1
  • haxtheweb hax 26.0.1, 26.0.2
  • haxtheweb haxcms-php 26.0.2
  • psu haxcms-php 26.0.2
  • haxtheweb haxcms-nodejs 26.0.1
  • psu haxcms-nodejs 26.0.1

Is CVE-2026-48527 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/haxtheweb/issues/security/advisories/GHSA-g2g8-95qg-v35h referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
GitHub 3.1 8.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm @haxtheweb/haxcms-nodejs
<26.0.1
26.0.1

Affected products

  • haxtheweb haxcms-nodejs
  • haxtheweb haxcms-php

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.