Moodle Prompt Injection Vulnerability (MSA-25-0053)

# SPDX-FileCopyrightText: 2025 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("1.3.6.1.4.1.25623.1.0.136752");
  script_version("2026-02-12T05:59:59+0000");
  script_tag(name:"last_modification", value:"2026-02-12 05:59:59 +0000 (Thu, 12 Feb 2026)");
  script_tag(name:"creation_date", value:"2025-12-22 11:45:41 +0000 (Mon, 22 Dec 2025)");
  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:"2026-02-11 18:31:37 +0000 (Wed, 11 Feb 2026)");

  script_cve_id("CVE-2025-67849");

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

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

  script_name("Moodle Prompt Injection Vulnerability (MSA-25-0053)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 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 prompt injection vulnerability.");

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

  script_tag(name:"insight", value:"Moodle insufficient sanitizes of AI provider responses.");

  script_tag(name:"impact", value:"Successful exploitation results in cross site scripting
  (XSS).");

  script_tag(name:"affected", value:"Moodle version 4.5.x through 4.5.7, 5.0.0 through 5.0.3,
  5.1.");

  script_tag(name:"solution", value:"Update to version 4.5.8, 5.0.4, 5.1.1 or later.");

  script_xref(name:"URL", value:"https://moodle.org/mod/forum/discuss.php?d=471299&parent=1892201");

  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_exclusive(version: version, test_version_lo: "4.5.0", test_version_up: "4.5.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.5.8", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}


if (version_in_range_exclusive(version: version, test_version_lo: "5.0.0", test_version_up: "5.0.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.4", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);