Grafana Labs < 11.6.1+security-01 Authorization Bypass (CVE-2025-3260)

medium Nessus Plugin ID 237905

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Synopsis

The remote host is missing a security update.

Description

The version of Grafana Labs installed on the remote host is affected by a vulnerability as referenced in the CVE-2025-3260 advisory. Grafana's datasource proxy API allows authorization checks to be bypassed by adding an extra slash character in the URL path. Users with minimal permissions could gain unauthorized read access to GET endpoints in Alertmanager and Prometheus datasources. The issue primarily affects datasources that implement route-specific permissions, including Alertmanager and certain Prometheus-based datasources.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update Grafana Labs to 11.6.1+security-01 or later.

Plugin Details

Severity: Medium

ID: 237905

File Name: grafana_CVE-2025-3260.nasl

Version: 1.1

Type: remote

Family: Web Servers

Published: 6/6/2025

Updated: 6/6/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.4

CVSS v2

Risk Factor: Medium

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2025-3260

CVSS v3

Risk Factor: Medium

Base Score: 5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Vulnerability Information

CPE: cpe:/a:grafana:grafana

Patch Publication Date: 6/2/2025

Vulnerability Publication Date: 6/2/2025

Reference Information

CVE: CVE-2025-3260

IAVB: 2025-B-0087

Detections

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