Concrete5 <= 8.4.3 XSS Vulnerability

# SPDX-FileCopyrightText: 2019 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:concretecms:concrete_cms";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.112595");
  script_version("2025-10-22T05:39:59+0000");
  script_tag(name:"last_modification", value:"2025-10-22 05:39:59 +0000 (Wed, 22 Oct 2025)");
  script_tag(name:"creation_date", value:"2019-06-19 13:19:12 +0200 (Wed, 19 Jun 2019)");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-15 20:43:00 +0000 (Thu, 15 Jul 2021)");

  script_cve_id("CVE-2018-19146");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Concrete5 <= 8.4.3 XSS Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_portlandlabs_concrete_cms_http_detect.nasl");
  script_mandatory_keys("concrete_cms/detected");

  script_tag(name:"summary", value:"Concrete5 is prone to a stored cross-site scripting (XSS)
  vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The vulnerability exists because config/concrete.php allows
  uploads (by administrators) of SVG files that may contain HTML data with a SCRIPT element.");

  script_tag(name:"impact", value:"Successful exploitation would allow an authenticated attacker
  to store malicious code inside the application which is then being executed when browsing to an
  affected site.");

  script_tag(name:"affected", value:"Concrete5 through version 8.4.3.");

  script_tag(name:"solution", value:"Update to version 8.4.4 or later.");

  script_xref(name:"URL", value:"https://hackerone.com/reports/437863");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if(!port = get_app_port(cpe: CPE))
  exit(0);

if(!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
path = infos["location"];

if(version_is_less(version: version, test_version: "8.4.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "8.4.4", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);