Discourse < 3.0.3 Multiple Vulnerabilities

# 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:discourse:discourse";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.149573");
  script_version("2025-04-11T15:45:04+0000");
  script_tag(name:"last_modification", value:"2025-04-11 15:45:04 +0000 (Fri, 11 Apr 2025)");
  script_tag(name:"creation_date", value:"2023-04-21 05:21:47 +0000 (Fri, 21 Apr 2023)");
  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:"2023-04-28 03:50:00 +0000 (Fri, 28 Apr 2023)");

  script_cve_id("CVE-2023-29196", "CVE-2023-30538", "CVE-2023-28440");

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

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

  script_name("Discourse < 3.0.3 Multiple Vulnerabilities");

  script_category(ACT_GATHER_INFO);

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

  script_tag(name:"summary", value:"Discourse is prone to multiple vulnerabilities");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - CVE-2023-29196: HTML injection via topic embedding

  - CVE-2023-30538: Stored XSS via improper sanitization of SVG uploads

  - CVE-2023-28440: DoS via admin theme import route");

  script_tag(name:"affected", value:"Discourse prior to 3.0.3.");

  script_tag(name:"solution", value:"Update to version 3.0.3 or later.");

  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48");
  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43");
  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-vm65-pv5h-6g3w");

  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: "3.0.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.0.3", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);