Dotnetnuke < 13.3.3 Stored XSS potentially leading to host privilege escalation (GHSA-38xj-rgg3-5cjj)

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

include('compat.inc');

if (description)
{
  script_id(339489);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/25");

  script_name(english:"Dotnetnuke < 13.3.3 Stored XSS potentially leading to host privilege escalation (GHSA-38xj-rgg3-5cjj)");

  script_set_attribute(attribute:"synopsis", value:
"An ASP.NET 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 Dotnetnuke running on the remote web server is prior to 13.3.3.
It is, therefore, affected by a vulnerability.

  - A stored cross-site scripting (XSS) vulnerability in the Console module could allow a Portal Administrator
    to execute arbitrary script in the browser of a Host/SuperUser. Successful exploitation could result in
    privilege escalation of an administrator of a single portal to installation-wide administrative access. A
    vulnerability was identified in the Console module's handling of administrator-managed content. Under
    certain conditions, user-supplied content was not properly sanitized or encoded before being rendered in
    an administrative interface. This vulnerability is of particular concern for multi-portal installations.
    An attacker with Portal Administrator privileges could store malicious content that executes when a
    Host/SuperUser accesses the affected administrative interface. Because Host/SuperUser accounts have
    installation-wide authority, successful exploitation could lead to privilege escalation beyond a single
    portal, potentially allowing unauthorized administrative actions across the entire DNN installation.
    (GHSA-38xj-rgg3-5cjj)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-38xj-rgg3-5cjj
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fc573d78");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Dotnetnuke version 13.3.3 or later.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(79);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:dotnetnuke:dotnetnuke");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:dnnsoftware:dotnetnuke");
  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("dotnetnuke_detect.nasl");
  script_require_keys("installed_sw/DNN");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

var app = 'DNN';

get_install_count(app_name:app, exit_if_zero:TRUE);

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

var app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  { 'fixed_version' : '13.3.3' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE,
    flags:{'xss':TRUE}
);