JetBrains YouTrack < 2024.2.148429 / < 2024.3.148430 / < 2025.1.148120 / < 2025.2.148048 / < 2025.3.148033 / < 2026.1.13757 Authentication Bypass (CVE-2026-50242)

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

include('compat.inc');

if (description)
{
  script_id(322257);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/29");

  script_cve_id("CVE-2026-50242");
  script_xref(name:"IAVA", value:"2026-A-0622");

  script_name(english:"JetBrains YouTrack < 2024.2.148429 / < 2024.3.148430 / < 2025.1.148120 / < 2025.2.148048 / < 2025.3.148033 / < 2026.1.13757 Authentication Bypass (CVE-2026-50242)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an authentication bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of JetBrains YouTrack installed on the remote host is prior to 2024.2.148429, 2024.3.x prior to
2024.3.148430, 2025.1.x prior to 2025.1.148120, 2025.2.x prior to 2025.2.148048, 2025.3.x prior to 2025.3.148033, or
2026.1.x prior to 2026.1.13757. It is, therefore, affected by an authentication bypass vulnerability:

  - Authentication bypass via direct database access leading to administrative access was possible.
    (CVE-2026-50242)

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.jetbrains.com/privacy-security/issues-fixed/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to JetBrains YouTrack version 2024.2.148429, 2024.3.148430, 2025.1.148120, 2025.2.148048, 2025.3.148033,
2026.1.13757, or later.");
  script_set_attribute(attribute:"agent", value:"all");
  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:U/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:U/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:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-50242");

  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:"2026/06/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:jetbrains:youtrack");
  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("jetbrains_youtrack_win_installed.nbin", "jetbrains_youtrack_nix_installed.nbin");
  script_require_keys("installed_sw/JetBrains YouTrack");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'JetBrains YouTrack', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '2024.2.148429'},
        {'min_version': '2024.3', 'fixed_version': '2024.3.148430'},
        {'min_version': '2025.1', 'fixed_version': '2025.1.148120'},
        {'min_version': '2025.2', 'fixed_version': '2025.2.148048'},
        {'min_version': '2025.3', 'fixed_version': '2025.3.148033'},
        {'min_version': '2026.1', 'fixed_version': '2026.1.13757'}
      ]
    }
  ]
};

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