Joomla 1.0.x < 5.4.8 / 6.0.x < 6.1.3 Joomla 6.1.3 & 5.4.8 Security & Bugfix Release (joomla-6-1-3-5-4-8-security-bugfix-release)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(337679);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/18");

  script_cve_id("CVE-2026-73373");

  script_name(english:"Joomla 1.0.x < 5.4.8 / 6.0.x < 6.1.3 Joomla 6.1.3 & 5.4.8 Security & Bugfix Release (joomla-6-1-3-5-4-8-security-bugfix-release)");

  script_set_attribute(attribute:"synopsis", value:
"A PHP application running on the remote web server is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the instance of Joomla! running on the remote web server is 1.0.x prior to 5.4.8
or 6.0.x prior to 6.1.3. It is, therefore, affected by a vulnerability.

  - Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The
    default list of dangerous files did not include SHTML files. On servers that executed these files, that
    could lead to code execution. (CVE-2026-73373)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://developer.joomla.org/security-centre/1068-20260801-core-response-header-injection-in-download-views.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a0ffd044");
  # https://developer.joomla.org/security-centre/1069-20260802-core-improper-cors-origin-validation.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d5bc862");
  # https://developer.joomla.org/security-centre/1070-20260803-core-inconsistent-acl-checks-for-mutating-webservice-endpoints.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?91a22ac8");
  # https://developer.joomla.org/security-centre/1071-20260804-core-improper-acl-checks-for-custom-fields-webservice-endpoints.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2ce1f77e");
  # https://developer.joomla.org/security-centre/1072-20260805-core-improper-acl-checks-for-category-webservice-endpoints.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f5526f21");
  # https://developer.joomla.org/security-centre/1073-20260806-core-xss-through-schema-org-outputs.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4aa8c439");
  # https://developer.joomla.org/security-centre/1074-20260807-core-mfa-authentication-bypass.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fda81e1f");
  # https://developer.joomla.org/security-centre/1075-20260808-core-improper-acl-checks-for-batch-copy-actions.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?88fa5d30");
  # https://developer.joomla.org/security-centre/1076-20260809-core-improper-acl-checks-when-injection-schema-org-contact-data.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b7fd7a9c");
  # https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ad50f338");
  # https://www.joomla.org/announcements/release-news/joomla-6-1-3-5-4-8-security-bugfix-release.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b05d7d8a");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Joomla! version 5.4.8 / 6.1.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-73373");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/18");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:joomla:joomla\!");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("joomla_detect.nasl");
  script_require_keys("installed_sw/Joomla!", "www/PHP", "Settings/ParanoidReport");
  script_require_ports("Services/www", 80);

  exit(0);
}

include('vcf.inc');
include('http.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var port = get_http_port(default:80, php:TRUE);

var app_info = vcf::get_app_info(app:'Joomla!', port:port, webapp:TRUE);

vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  { 'min_version' : '1.0.0', 'max_version' : '5.4.7', 'fixed_version' : '5.4.8' },
  { 'min_version' : '6.0.0', 'max_version' : '6.1.2', 'fixed_version' : '6.1.3' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE
);