Moodle 3.7 <= 3.7.6, 3.8 <= 3.8.3, 3.9 < 3.9.1 Cross-site Scripting (XSS) Vulnerability

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.0.124141");
  script_version("2023-12-20T05:05:58+0000");
  script_tag(name:"last_modification", value:"2023-12-20 05:05:58 +0000 (Wed, 20 Dec 2023)");
  script_tag(name:"creation_date", value:"2022-08-17 11:31:42 +0000 (Wed, 17 Aug 2022)");
  script_tag(name:"cvss_base", value:"6.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-08-17 15:17:00 +0000 (Wed, 17 Aug 2022)");

  script_cve_id("CVE-2020-14320");

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

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

  script_name("Moodle 3.7 <= 3.7.6, 3.8 <= 3.8.3, 3.9 < 3.9.1 Cross-site Scripting (XSS) Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2022 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 an cross-site scripting vulnerability.");

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

  script_tag(name:"insight", value:"In Moodle the filter in the admin task log required extra
  sanitizing to prevent a reflected XSS risk.");

  script_tag(name:"affected", value:"Moodle versions 3.7 through 3.7.6, 3.8
  through 3.8.3 and 3.9.x prior to 3.9.1");

  script_tag(name:"solution", value:"Update to version 3.5.13, 3.7.7, 3.8.4, 3.9.1 or later.");

  script_xref(name:"URL", value:"https://moodle.org/mod/forum/discuss.php?d=407392");

  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_in_range(version: version, test_version: "3.7", test_version2: "3.7.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.7.7", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "3.8", test_version2: "3.8.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.8.4", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "3.9", test_version_up: "3.9.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.9.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);