Moodle <= 3.11.4 XSS Vulnerability

# SPDX-FileCopyrightText: 2024 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:moodle:moodle";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.126656");
  script_version("2025-03-25T05:38:56+0000");
  script_tag(name:"last_modification", value:"2025-03-25 05:38:56 +0000 (Tue, 25 Mar 2025)");
  script_tag(name:"creation_date", value:"2024-03-22 10:00:26 +0000 (Fri, 22 Mar 2024)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");

  script_cve_id("CVE-2024-29374");

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

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

  script_name("Moodle <= 3.11.4 XSS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_moodle_cms_detect.nasl");
  script_mandatory_keys("moodle/detected");

  script_tag(name:"summary", value:"Moodle is prone to a 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:"Moodle allows to perform XSS via the 'GET /?lang' URL parameter.
  This parameter is likely used to specify the user's preferred language for the MOODLE
  interface.");

  script_tag(name:"affected", value:"Moodle version 3.11.4 and prior.");

  # nb: You can check e.g. here if there are any updates available:
  # - https://moodle.org/search/index.php?q=%22CVE-2024-29374%22
  # - https://moodle.org/mod/forum/view.php?id=7128
  # - https://moodle.org/mod/forum/search.php?id=1&words=CVE-2024-29374
  script_tag(name:"solution", value:"No known solution was made available for at least one year since
  the disclosure of this vulnerability. Likely none will be provided anymore. General solution options
  are to upgrade to a newer release, disable respective features, remove the product or replace the
  product by another one.");

  script_xref(name:"URL", value:"https://gist.github.com/fir3storm/f9c7f3ec1a6496498517ed216d2640b2");

  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"];
location = infos["location"];

if (version_is_less_equal(version: version, test_version: "3.11.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "None", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(0);