Nextcloud Server XSS Vulnerability (GHSA-qcw2-p26m-9gc5)

# 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:nextcloud:nextcloud_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.125575");
  script_version("2025-12-10T05:45:47+0000");
  script_tag(name:"last_modification", value:"2025-12-10 05:45:47 +0000 (Wed, 10 Dec 2025)");
  script_tag(name:"creation_date", value:"2025-12-09 08:08:40 +0000 (Tue, 09 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:"2025-12-09 16:38:19 +0000 (Tue, 09 Dec 2025)");

  script_cve_id("CVE-2025-66512");

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

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

  script_name("Nextcloud Server XSS Vulnerability (GHSA-qcw2-p26m-9gc5)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_nextcloud_server_http_detect.nasl");
  script_mandatory_keys("nextcloud/server/detected");

  script_tag(name:"summary", value:"Nextcloud Server 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:"A missing sanitization allowed malicious users to circumvent the
  content security policy when a malicious user manages to trick a user it viewing an uploaded SVG
  outside of the Nextcloud Servers web page.");

  script_tag(name:"affected", value:"Nextcloud Server version 31.0.0 prior to 31.0.12 and 32.0.0
  prior to 32.0.3.");

  script_tag(name:"solution", value:"Update to version 31.0.12, 32.0.3 or later.");

  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qcw2-p26m-9gc5");

  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: "31.0.0", test_version_up: "31.0.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "31.0.12", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "32.0.0", test_version_up: "32.0.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "32.0.3", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);