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VuXML IDDescription
4b478274-47a0-11ec-bd24-6c3be5272acdGrafana -- XSS

Grafana Labs reports:

If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript content may be executed within the context of the victim’s browser.

The user visiting the malicious link must be unauthenticated, and the link must be for a page that contains the login button in the menu bar.

There are two ways an unauthenticated user can open a page in Grafana that contains the login button:

  • Anonymous authentication is enabled. This means all pages in Grafana would be open for the attack.
  • The link is to an unauthenticated page. The following pages are vulnerable:
    • /dashboard-solo/snapshot/*
    • /dashboard/snapshot/*
    • /invite/:code

The url has to be crafted to exploit AngularJS rendering and contain the interpolation binding for AngularJS expressions. AngularJS uses double curly braces for interpolation binding: {{ }}

An example of an expression would be: {{constructor.constructor(‘alert(1)’)()}}. This can be included in the link URL like this:'alert(1)')()%7D%7D?orgId=1

When the user follows the link and the page renders, the login button will contain the original link with a query parameter to force a redirect to the login page. The URL is not validated, and the AngularJS rendering engine will execute the JavaScript expression contained in the URL.

Discovery 2021-10-21
Entry 2021-12-11
ge 8.0.0 lt 8.2.3