Open WebUI < 0.9.5 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(314912);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/20");

  script_cve_id("CVE-2026-45398", "CVE-2026-45401");

  script_name(english:"Open WebUI < 0.9.5 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"An AI platform running on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Open WebUI running on the remote host is prior to 0.9.5. It is, therefore, affected by multiple
vulnerabilities:

  - An insecure direct object reference (IDOR) vulnerability in the retrieval API allows any authenticated user who
    knows a private knowledge base UUID to bypass access controls and read, inject content into, or destroy another
    user's knowledge base. The _validate_collection_access() function only checks user-memory-* and file-* collection
    name prefixes but does not validate knowledge base collections which use raw UUIDs. (CVE-2026-45398)

  - A server-side request forgery (SSRF) vulnerability exists because the validate_url() function only validates the
    initial URL submitted by the caller. HTTP clients used downstream follow 3xx redirects by default without
    re-validating the redirect target against the private-IP block list. Any authenticated user can submit a public URL
    that redirects to an internal address and read the response. (CVE-2026-45401)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://github.com/open-webui/open-webui/security/advisories/GHSA-4g37-7p2c-38r9
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?47d441b2");
  # https://github.com/open-webui/open-webui/security/advisories/GHSA-rh5x-h6pp-cjj6
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2f35f14e");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Open WebUI version 0.9.5 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-45398");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-45401");

  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:"2026/05/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/15");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openwebui:open_webui");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Artificial Intelligence");

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

  script_dependencies("open_webui_web_detect.nbin");
  script_require_keys("installed_sw/Open WebUI");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Open WebUI', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '0.9.5'}
      ]
    }
  ]
};

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