4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
0.961 High
EPSS
Percentile
99.5%
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:
https://play.grafana.org/dashboard/snapshot/{{constructor.constructor('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.
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
0.961 High
EPSS
Percentile
99.5%