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 r...

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

84.61%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Grafana	Grafana	>= 8.0.0, < 8.2.3

References

https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c912Patch, Third Party Advisory
https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983f82Patch, Third Party Advisory
https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0de88Patch, Third Party Advisory
https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8Third Party Advisory
https://security.netapp.com/advisory/ntap-20211125-0003/Third Party Advisory
https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c912Patch, Third Party Advisory
https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983f82Patch, Third Party Advisory
https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0de88Patch, Third Party Advisory
https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8Third Party Advisory
https://security.netapp.com/advisory/ntap-20211125-0003/Third Party Advisory

Timeline

Published: Nov 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is 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.

How severe is CVE-2021-41174?

CVE-2021-41174 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 84.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41174?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.