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.
saveManifest()
saveNode()
https://<site>/<user>/system/api/saveNode
https://<site>/<user>/system/api/saveManifest
An authenticated attacker can use the site editor and settings editor to store malicious payloads in a HAX site which execute arbitrary JavaScript when a user visits the site. This can be used to steal a user's session cookie or other sensitive data.
To replicate this vulnerability, an attacker can use the "View Source" functionality within the site editor to enter a malicious payload.
To exploit the 'SaveManifest' endpoint, an attacker can insert executable code into the URL field of the site settings editor: any payload added this way will execute when the site is loaded.
{ "nvd_published_at": "2025-06-09T21:15:46Z", "cwe_ids": [ "CWE-79", "CWE-80", "CWE-87" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2025-06-09T17:43:37Z" }