CVE-2025-49137: Hax CMS Stored Cross-Site Scripting vulnerability
Description
HAX CMS PHP allows users to manage their microsite universe with a PHP backend. Prior to version 11.0.0, the application does not sufficiently sanitize user input, allowing for the execution of arbitrary JavaScript code. The 'saveNode' and 'saveManifest' endpoints take user input and store it in the JSON schema for the site. This content is then rendered in the generated HAX site. Although the application does not allow users to supply a `script` tag, it does allow the use of other HTML tags to run JavaScript. Version 11.0.0 fixes the issue.
Classification
CVE ID: CVE-2025-49137
CVSS Base Severity: HIGH
CVSS Base Score: 8.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Problem Types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) CWE-87: Improper Neutralization of Alternate XSS SyntaxAffected Products
Vendor: haxtheweb
Product: issues
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 14.87% (scored less or equal to compared to others)
EPSS Date: 2025-06-14 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-49137https://github.com/haxtheweb/issues/security/advisories/GHSA-2vc4-3hx7-v7v7
https://github.com/haxtheweb/haxcms-php/commit/0dd3e98fe2fadd0793b667d4af2aac230980e0f8