Grafana Labs 12.0.x < 12.4.12 / 13.0.x < 13.0.10 / 13.1.x < 13.1.7 / 13.2.x < 13.2.3 Improper Authorization (CVE-2026-13720)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(362624);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/02");

  script_cve_id("CVE-2026-13720");
  script_xref(name:"IAVB", value:"2026-B-0278");

  script_name(english:"Grafana Labs 12.0.x < 12.4.12 / 13.0.x < 13.0.10 / 13.1.x < 13.1.7 / 13.2.x < 13.2.3 Improper Authorization (CVE-2026-13720)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an improper authorization vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Grafana Labs installed on the remote host is 12.0.x through 12.4.x prior to 12.4.12, or 13.0.x
prior to 13.0.10, or 13.1.x prior to 13.1.7, or 13.2.x prior to 13.2.3. It is, therefore, affected by an
improper authorization vulnerability:

  - An Editor can set file-provisioning metadata (the grafana.app/managedBy, grafana.app/managerId and
    grafana.app/sourcePath annotations) when creating a dashboard through the dashboard API, because these
    fields were stored without an authorization check. The dashboard then appears file-provisioned, and
    administrators can no longer update or delete it through Grafana. The impact is limited to the same
    organization and no data is exposed. (CVE-2026-13720)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://grafana.com/security/security-advisories/cve-2026-13720/");
  script_set_attribute(attribute:"solution", value:
"Update Grafana Labs to 12.4.12, 13.0.10, 13.1.7, 13.2.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-13720");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:grafana:grafana");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("grafana_labs_detect.nbin");
  script_require_keys("installed_sw/Grafana Labs");
  script_require_ports("Services/www", 3000);

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Grafana Labs', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '12.0.0', 'fixed_version': '12.4.12'},
        {'min_version': '13.0.0', 'fixed_version': '13.0.10'},
        {'min_version': '13.1.0', 'fixed_version': '13.1.7'},
        {'min_version': '13.2.0', 'fixed_version': '13.2.3'}
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);