High severity · published May 29, 2026
CVE-2026-48527
HaxCMS has a stored Cross-Site Scripting (XSS) bypass in saveNode endpoint
8.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
haxcms-nodejs · haxtheweb
< 26.0.1 · source: vendor
HA
haxcms-php · haxtheweb
< 26.0.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48527
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48527
github.com
https://github.com/haxtheweb/issues/security/advisories/GHSA-g2g8-95qg-v35h
More from haxcms-nodejs
9.4
CVE-2026-46399
Authenticated Remote Code Execution via File Overwrite
9.3
CVE-2026-46496
HAX CMS: Stored XSS via '<video-player>' component allows arbitrary JavaScript execution and token theft
9.3
CVE-2026-46396
HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover
9.3
CVE-2026-46395
HAX CMS Vulnerable to Private Key Disclosure via Broken HMAC Implementation
8.7
CVE-2026-46511
HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack