CVE-2025-11539: 
Grafana vulnerability analysis and mitigation

Grafana Image Renderer is vulnerable to remote code execution due to an arbitrary file write vulnerability in versions 1.0.0 through 4.0.16. The vulnerability was discovered and disclosed on October 9, 2025, and is tracked as CVE-2025-11539. The issue affects the /render/csv endpoint which lacks proper validation of the filePath parameter, allowing attackers to save a shared object to arbitrary locations that can then be loaded by the Chromium process (Grafana Advisory).

The vulnerability exists in the /render/csv endpoint where insufficient validation of the filePath parameter enables arbitrary file write capabilities. The vulnerability is rated as Critical with a CVSS v3.1 score of 9.9 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H). Two conditions must be met for successful exploitation: 1) The default authentication token (authToken) must either remain unchanged or be known to the attacker, and 2) The attacker must have network access to the image renderer endpoint (Grafana Advisory).

If successfully exploited, this vulnerability allows attackers to execute arbitrary code through the Chromium process by leveraging the arbitrary file write capability. The high CVSS score of 9.9 indicates severe potential impact on the confidentiality, integrity, and availability of the affected systems (Grafana Advisory).

Users should immediately upgrade to Grafana Image Renderer version 4.0.17 or later, which contains the fix for this vulnerability. The patch was released on October 9, 2025 (GitHub Release).