MyBB < 1.8.36 RCE Vulnerability

# SPDX-FileCopyrightText: 2023 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:mybb:mybb";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.124418");
  script_version("2025-04-30T05:39:51+0000");
  script_tag(name:"last_modification", value:"2025-04-30 05:39:51 +0000 (Wed, 30 Apr 2025)");
  script_tag(name:"creation_date", value:"2023-08-30 09:45:46 +0000 (Wed, 30 Aug 2023)");
  script_tag(name:"cvss_base", value:"8.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:M/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-08-31 18:29:00 +0000 (Thu, 31 Aug 2023)");

  script_cve_id("CVE-2023-41362");

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

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

  script_name("MyBB < 1.8.36 RCE Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("sw_mybb_http_detect.nasl");
  script_mandatory_keys("mybb/detected");

  script_tag(name:"summary", value:"MyBB is prone to a remote code execution (RCE)
  vulnerability.");

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

  script_tag(name:"insight", value:"Improper validation logic in the Admin CP's Templates module
  allows remote authenticated users to execute arbitrary code (RCE) by supplying specially crafted
  template content.");

  script_tag(name:"affected", value:"MyBB prior to version 1.8.36.");

  script_tag(name:"solution", value:"Update to version 1.8.36 or later.");

  script_xref(name:"URL", value:"https://github.com/mybb/mybb/security/advisories/GHSA-pr74-wvp3-q6f5");

  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(version: version, test_version: "1.8.36")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.8.36", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);