Atlassian Confluence 9.1.x < 9.2.24 / 9.3.x < 10.2.19 / 11.0.0 (CONFSERVER-104501)

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

include('compat.inc');

if (description)
{
  script_id(368963);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/21");

  script_cve_id("CVE-2026-13676");

  script_name(english:"Atlassian Confluence 9.1.x < 9.2.24 / 9.3.x < 10.2.19 / 11.0.0 (CONFSERVER-104501)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Atlassian Confluence host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Atlassian Confluence Server running on the remote host is affected by a vulnerability as referenced in
the CONFSERVER-104501 advisory.

  - fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-
    family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor,
    silently leaving the host in its original Unicode form while normalize() and equal() still return values
    that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based
    policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the
    same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to
    different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line.
    Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-
    ASCII hosts before policy checks. (CVE-2026-13676)

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://jira.atlassian.com/browse/CONFSERVER-104501");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 9.2.24, 10.2.19, 11.0.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/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:N/UI:N/S:U/C:N/I:H/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-2026-13676");

  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:"2026/06/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:confluence");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  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("confluence_detect.nasl", "confluence_nix_installed.nbin", "confluence_win_installed.nbin");
  script_require_keys("installed_sw/Atlassian Confluence");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "checks": [
    {
      "product": {
        "name": "Atlassian Confluence",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "min_version": "9.1.0",
          "fixed_version": "9.2.24",
          "fixed_display": "9.2.24 / 10.2.19 / 11.0.0"
        },
        {
          "min_version": "9.3.1",
          "fixed_version": "10.2.19",
          "fixed_display": "10.2.19 / 11.0.0"
        }
      ]
    }
  ]
};

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