Notepad++ DLL WinGUp Update Hijacking Vulnerability (Dec 2025)

# 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:notepad-plus-plus:notepad++";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.836929");
  script_version("2026-02-16T06:02:08+0000");
  script_cve_id("CVE-2025-15556");
  script_tag(name:"cvss_base", value:"7.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2026-02-16 06:02:08 +0000 (Mon, 16 Feb 2026)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2026-02-13 14:03:47 +0000 (Fri, 13 Feb 2026)");
  script_tag(name:"creation_date", value:"2025-12-16 15:03:13 +0530 (Tue, 16 Dec 2025)");
  script_name("Notepad++ DLL WinGUp Update Hijacking Vulnerability (Dec 2025)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2025 Greenbone AG");
  script_family("General");
  script_dependencies("gb_notepadpp_detect_portable_win.nasl", "gb_notepadpp_detect_win.nasl");
  script_mandatory_keys("Notepad++64/Win/installed");

  script_xref(name:"URL", value:"https://notepad-plus-plus.org/news/v889-released/");
  script_xref(name:"URL", value:"https://notepad-plus-plus.org/news/hijacked-incident-info-update/");

  script_tag(name:"summary", value:"Notepad++ is prone to a WinGUp update hijacking
  vulnerability.");

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

  script_tag(name:"impact", value:"Successful exploitation allows an attacker to intercept the
  network traffic between the updater client and the Notepad++ update infrastructure.");

  script_tag(name:"affected", value:"Notepad++ prior to version 8.8.9.");

  script_tag(name:"solution", value:"Update to version 8.8.9.");

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

  exit(0);
}

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

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

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

if(version_is_less(version:vers, test_version:"8.8.9")) {
  report = report_fixed_ver(installed_version:vers, fixed_version:"8.8.9", install_path:path);
  security_message(port:0, data:report);
  exit(0);
}

exit(99);