Next.js Framework 13.4.x < 15.5.16 / 16.x < 16.2.5 Stored XSS

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

include('compat.inc');

if (description)
{
  script_id(314907);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/18");

  script_cve_id("CVE-2026-44581");
  script_xref(name:"IAVA", value:"2026-A-0443");

  script_name(english:"Next.js Framework 13.4.x < 15.5.16 / 16.x < 16.2.5 Stored XSS");

  script_set_attribute(attribute:"synopsis", value:
"The Next.js Framework on the remote host is affected by a stored cross-site scripting vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Next.js Framework on the remote host is affected by a stored cross-site scripting vulnerability:

  - App Router applications that rely on CSP nonces can be vulnerable to stored cross-site scripting when deployed
    behind shared caches. In affected versions, malformed nonce values derived from request headers could be
    reflected into rendered HTML in an unsafe way, allowing an attacker to poison cached responses and cause script
    execution for later visitors. (CVE-2026-44581)

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/vercel/next.js/security/advisories/GHSA-ffhc-5mcf-pf4q
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6dc8b52f");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Next.js Framework version 15.5.16 or 16.2.5 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/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:H/PR:N/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:"cvss_score_source", value:"CVE-2026-44581");

  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:"2026/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:vercel:next.js");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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');

vcf::add_separator('-');
vcf::add_conversions({'canary':-25});

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

if (empty_or_null(app_info))
  audit(AUDIT_NOT_INST, 'next');

var constraints = [
  {'min_version':'13.4.0', 'fixed_version':'15.5.16'},
  {'min_version':'16.0.0', 'fixed_version':'16.2.5'}
];

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