Joomla! 2.5.0 - 3.9.27 Multiple Vulnerabilities

# SPDX-FileCopyrightText: 2021 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:joomla:joomla";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.146242");
  script_version("2026-04-30T06:27:06+0000");
  script_tag(name:"last_modification", value:"2026-04-30 06:27:06 +0000 (Thu, 30 Apr 2026)");
  script_tag(name:"creation_date", value:"2021-07-08 04:48:56 +0000 (Thu, 08 Jul 2021)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-09 14:20:00 +0000 (Fri, 09 Jul 2021)");

  script_cve_id("CVE-2021-26036", "CVE-2021-26037", "CVE-2021-26038");

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

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

  script_name("Joomla! 2.5.0 - 3.9.27 Multiple Vulnerabilities");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("joomla_http_detect.nasl");
  script_mandatory_keys("joomla/detected");

  script_tag(name:"summary", value:"Joomla! 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-2021-26036: Missing validation of input could lead to a broken usergroups table.

  - CVE-2021-26037: CMS functions did not properly terminate existing user sessions when a user's
  password was changed or the user was blocked.

  - CVE-2021-26038: Install action in com_installer lack the required hardcoded ACL checks for
  superusers. A default system is not affected cause the default ACL for com_installer is limited
  to super users already.");

  script_tag(name:"affected", value:"Joomla! version 2.5.0 through 3.9.27.");

  script_tag(name:"solution", value:"Update to version 3.9.28 or later.");

  script_xref(name:"URL", value:"https://developer.joomla.org/security-centre.html");

  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(version: version, test_version: "2.5.0", test_version2: "3.9.27")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.9.28", install_path: location);
  security_message(data: report, port: port);
  exit(0);
}

exit(99);