Vulnerability Details : CVE-2021-41174

Grafana is an open-source platform for monitoring and observability. In affected versions 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. 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: {{ }} ex: {{constructor.constructor(‘alert(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. Users are advised to upgrade as soon as possible. If for some reason you cannot upgrade, you can use a reverse proxy or similar to block access to block the literal string {{ in the path.
Vulnerability category: Cross site scripting (XSS)
Published 2021-11-03 18:15:08
Updated 2021-11-29 17:13:22
Source GitHub, Inc.
View at NVD,

Exploit prediction scoring system (EPSS) score for CVE-2021-41174

Probability of exploitation activity in the next 30 days: 96.46%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-41174

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source

CWE ids for CVE-2021-41174

References for CVE-2021-41174

Products affected by CVE-2021-41174

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