Discourse < 3.5.1 Multiple Vulnerabilities

# 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:discourse:discourse";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.155529");
  script_version("2025-10-31T05:40:56+0000");
  script_tag(name:"last_modification", value:"2025-10-31 05:40:56 +0000 (Fri, 31 Oct 2025)");
  script_tag(name:"creation_date", value:"2025-10-02 05:12:54 +0000 (Thu, 02 Oct 2025)");
  script_tag(name:"cvss_base", value:"6.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:M/C:C/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-10-16 17:33:47 +0000 (Thu, 16 Oct 2025)");

  script_cve_id("CVE-2025-58054", "CVE-2025-58055", "CVE-2025-59337");

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

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

  script_name("Discourse < 3.5.1 Multiple Vulnerabilities");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 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 flaws exist:

  - CVE-2025-58054: XSS when quoting chat messages via channel title and thread title in RTE

  - CVE-2025-58055: Insecure Direct Object Reference via AI Suggestions

  - CVE-2025-59337: Backup restore meta-command injection leading to cross-site data access in
  multisite environments");

  script_tag(name:"affected", value:"Discourse prior to version 3.5.1.");

  script_tag(name:"solution", value:"Update to version 3.5.1 or later.");

  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-7p47-8m82-m2vf");
  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr");
  script_xref(name:"URL", value:"https://github.com/discourse/discourse/security/advisories/GHSA-7xjr-4f4g-9887");
  script_xref(name:"URL", value:"https://meta.discourse.org/t/3-5-1-security-and-maintenance-release/383511");

  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: "3.5.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.5.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);