Joomla 1.5.x < 5.4.9 / 6.0.x < 6.1.4 Multiple Vulnerabilities (joomla-6-1-4-5-4-9-security-bugfix-release)

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

include('compat.inc');

if (description)
{
  script_id(362485);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/02");

  script_cve_id(
    "CVE-2026-90906",
    "CVE-2026-90907",
    "CVE-2026-92231",
    "CVE-2026-92232"
  );
  script_xref(name:"IAVA", value:"2026-A-1067");

  script_name(english:"Joomla 1.5.x < 5.4.9 / 6.0.x < 6.1.4 Multiple Vulnerabilities (joomla-6-1-4-5-4-9-security-bugfix-release)");

  script_set_attribute(attribute:"synopsis", value:
"A PHP application running on the remote web server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the instance of Joomla! running on the remote web server is 1.5.x prior to
5.4.9 or 6.0.x prior to 6.1.4. It is, therefore, affected by multiple vulnerabilities.

  - Joomla! Core - [20260902] - Core - Unauthorized user account creation via profile.save controller in
    Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The profile.save controller did not check the login state of a user,
    allowing the creation of guest-level users on sites without active user registration. (CVE-2026-90907)

  - Joomla! Core - [20260901] - XSS in HTMLHelper::link method in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - Lack of
    escaping leads to XSS vulnerabilities in the link method of the HTML Helper. (CVE-2026-90906)

  - Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in
    Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The checkAttribute method normalized an attribute value before testing
    it against the 'javascript:' scheme regex, however without decoding HTML5 entities beforehand, causing an
    XSS vector. (CVE-2026-92231)

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/1081-20260901-core-xss-in-htmlhelper-link-method.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6a6f762b");
  # https://developer.joomla.org/security-centre/1082-20260902-core-unauthorized-user-account-creation-via-profile-save-controller.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2cf22c3f");
  # https://developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decode-mismatch.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f083342d");
  # https://developer.joomla.org/security-centre/1096-20260916-core-xss-filter-bypass-in-inputfilter-via-whitespace-characters-in-html-data-uris.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5c562315");
  # https://www.joomla.org/announcements/release-news/joomla-6-1-4-5-4-9-security-bugfix-release.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?832125e4");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Joomla! version 5.4.9 / 6.1.4 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  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_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-90907");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/02");

  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:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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' : '1.5.0', 'max_version' : '5.4.8', 'fixed_version' : '5.4.9' },
  { 'min_version' : '6.0.0', 'max_version' : '6.1.3', 'fixed_version' : '6.1.4' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING,
    flags:{"xss":TRUE}
);