JavaScript URL Injection in Dashy Dashboard

Executive Summary

This vulnerability exists in Dashy versions prior to 4.3.7, where the workspace view trusts the URL query parameter and assigns it directly to an iframe source without validating the URL scheme.

If a logged-in user opens a specially crafted workspace link containing a javascript: URL, the JavaScript code runs on the Dashy origin.

This allows the malicious script to read same-origin browser data, interact with the Dashy Document Object Model (DOM), and send requests as if it were the victim user.

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Impact Analysis

The vulnerability can lead to unauthorized JavaScript execution within the Dashy application context.

This can result in an attacker reading sensitive browser data that shares the same origin, manipulating the Dashy interface, and performing actions on behalf of the victim user.

Such actions could compromise user data confidentiality and integrity, potentially leading to further exploitation or data leakage.

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Mitigation Strategies

To mitigate this vulnerability, upgrade Dashy to version 4.3.7 or later, where the issue with trusting the url query parameter in the workspace view and assigning it directly to an iframe source without scheme validation has been fixed.

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Compliance Impact

The vulnerability is a Cross-Site Scripting (XSS) issue that allows execution of malicious JavaScript in the context of the Dashy application, potentially exposing same-origin browser data and enabling unauthorized actions on behalf of the victim user.

Such a vulnerability could impact compliance with standards and regulations like GDPR and HIPAA because it may lead to unauthorized access or disclosure of personal or sensitive data handled within the Dashy application.

However, the CVE description and resources do not explicitly mention compliance impacts or regulatory considerations.

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Detection Guidance

This vulnerability can be detected by checking if your Dashy instance is running a version prior to 4.3.7, as versions before this do not sanitize the 'url' query parameter in the workspace view iframe source.

To detect potential exploitation attempts on your system or network, you can monitor web server logs for requests to the workspace view containing suspicious 'url' query parameters that include JavaScript schemes such as 'javascript:'.

Example commands to search for such suspicious URLs in web server logs (assuming logs are in access.log):

• grep -i 'workspace.*url=javascript:' access.log
• grep -E 'workspace.*url=javascript:' /var/log/nginx/access.log

Additionally, verifying the Dashy version can be done by checking the application version directly or by inspecting the deployed files for version metadata.

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