Kibana 8.x < 8.19.22 / 9.4.x < 9.4.6 Incorrect Authorization (ESA-2026-103)

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

include('compat.inc');

if (description)
{
  script_id(351487);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/30");

  script_cve_id("CVE-2026-72662");

  script_name(english:"Kibana 8.x < 8.19.22 / 9.4.x < 9.4.6 Incorrect Authorization (ESA-2026-103)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an incorrect authorization vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 8.x prior to 8.19.22, or 9.4.x prior to 9.4.6. It is, therefore,
affected by a vulnerability as referenced in the ESA-2026-103 advisory.

  - Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized disclosure,
    modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1).
    An authenticated user granted the Timeline feature privilege in a Kibana space could enumerate, read,
    modify, and delete draft Timeline objects belonging to other users in the same space. Read access is
    sufficient for enumeration and disclosure; the Timeline write privilege is required for modification and
    deletion. (CVE-2026-72662)

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://discuss.elastic.co/t/390679");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Kibana version 8.19.22, or 9.4.6 or later as appropriate for your release branch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-72662");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/30");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:kibana");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

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

  script_dependencies("kibana_web_detect.nbin");
  script_require_keys("installed_sw/Kibana");
  script_require_ports("Services/www", 5601);

  exit(0);
}

include('vcf.inc');
include('http.inc');

var app = 'Kibana';

get_install_count(app_name:app, exit_if_zero:TRUE);

var port = get_http_port(default:5601);

var app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

var constraints = [
  { 'min_version' : '8.0.0', 'fixed_version' : '8.19.22' },
  { 'min_version' : '9.4.0', 'fixed_version' : '9.4.6' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);