SmarterMail < 100.0.9511 Auth Bypass (CVE-2026-23760)

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

include('compat.inc');

if (description)
{
  script_id(297224);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/03");

  script_cve_id("CVE-2026-23760");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/02/16");

  script_name(english:"SmarterMail < 100.0.9511 Auth Bypass (CVE-2026-23760)");

  script_set_attribute(attribute:"synopsis", value:
"The remote mail server is affected by an authentication bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of SmarterTools SmarterMail installed on the remote host is prior to 100.0.9511. It is,
therefore, affected by an authentication bypass vulnerability. SmarterTools SmarterMail versions prior to
build 9511 contain an authentication bypass vulnerability in the password reset API. The force-reset-password
endpoint permits anonymous requests and fails to verify the existing password or a reset token when resetting
system administrator accounts. An unauthenticated attacker can supply a target administrator username and a
new password to reset the account, resulting in full administrative compromise of the SmarterMail instance.
NOTE: SmarterMail system administrator privileges grant the ability to execute operating system commands via
built-in management functionality, effectively providing administrative (SYSTEM or root) access on the
underlying host.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported 
version number.");
  script_set_attribute(attribute:"see_also", value:"https://www.smartertools.com/smartermail/release-notes/current");
  # https://labs.watchtowr.com/attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5fa9f963");
  script_set_attribute(attribute:"solution", value:
"Upgrade to SmarterTools SmarterMail version 100.0.9511 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-23760");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/30");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:smartertools:smartermail");
  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("smartertools_smartermail_detect.nbin");
  script_require_keys("installed_sw/SmarterTools SmarterMail");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'SmarterTools SmarterMail', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [{'fixed_version': '100.0.9511'}]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:result);