CVE-2025-49137: Hax CMS Stored Cross-Site Scripting vulnerability

June 9, 2025

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.

References

github.com/advisories/GHSA-2vc4-3hx7-v7v7
github.com/haxtheweb/haxcms-php/commit/0dd3e98fe2fadd0793b667d4af2aac230980e0f8
github.com/haxtheweb/issues
github.com/haxtheweb/issues/security/advisories/GHSA-2vc4-3hx7-v7v7
nvd.nist.gov/vuln/detail/CVE-2025-49137

Code Behaviors & Features

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