n8n Node.js Package < 1.123.9 / 2.x < 2.2.1 Stored XSS (CVE-2026-25054)

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

include('compat.inc');

if (description)
{
  script_id(298989);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/16");

  script_cve_id("CVE-2026-25054");

  script_name(english:"n8n Node.js Package < 1.123.9 / 2.x < 2.2.1 Stored XSS (CVE-2026-25054)");

  script_set_attribute(attribute:"synopsis", value:
"The n8n Node.js Package installed on the remote host is affected by a stored cross-site scripting vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of the n8n Node.js Package installed on the remote host is prior to 1.123.9, or 2.x prior to 2.2.1. It is,
therefore, affected by a stored cross-site scripting vulnerability:

  - A cross-site scripting (XSS) vulnerability existed in a markdown rendering component used in n8n's interface,
    including workflow sticky notes and other areas that support markdown content. An authenticated user with permission
    to create or modify workflows could abuse this to execute scripts with same-origin privileges when other users
    interact with a maliciously crafted workflow. This could lead to session hijacking and account takeover.
    (CVE-2026-25054)

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/n8n-io/n8n/security/advisories/GHSA-qpq4-pw7f-pp8w
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5feb88c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to n8n Node.js Package version 1.123.9 or 2.2.1 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N");
  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:L/UI:R/S:C/C:L/I:L/A:N");
  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:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-25054");

  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:"2026/02/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"asset_categories", value:"component");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:nodejs:node.js");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("nodejs_modules_win_installed.nbin", "nodejs_modules_linux_installed.nbin", "nodejs_modules_mac_installed.nbin");
  script_require_keys("Host/nodejs/modules/enumerated");

  exit(0);
}

include('vcf_extras_nodejs.inc');

get_kb_item_or_exit('Host/nodejs/modules/enumerated');

var app = 'n8n';
var app_info = vcf_extras::nodejs_modules::get_app_info(app:app);

if (empty_or_null(app_info))
  audit(AUDIT_NOT_INST, app);

var constraints = [
  {'fixed_version':'1.123.9'},
  {'min_version':'2.0.0', 'fixed_version':'2.2.1'}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING, flags: {'xss' : true});