Mattermost Server 9.11.x < 9.11.9 / 10.3.x < 10.3.4 / 10.4.x < 10.4.3 (MMSA-2025-00418)

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

include('compat.inc');

if (description)
{
  script_id(233453);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/25");

  script_cve_id("CVE-2025-27933");
  script_xref(name:"IAVA", value:"2025-A-0195-S");

  script_name(english:"Mattermost Server 9.11.x < 9.11.9 / 10.3.x < 10.3.4 / 10.4.x < 10.4.3 (MMSA-2025-00418)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Mattermost Server installed on the remote host is prior to 9.11.9, 10.3.4, or 10.4.3. It is, therefore,
affected by a vulnerability as referenced in the _MMSA-2025-00418 advisory.

  - Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel
    conversion restrictions, which allows members with permission to convert public channels to private ones
    to also convert private ones to public (CVE-2025-27933)

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://mattermost.com/security-updates/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mattermost Server version 9.11.9 / 10.3.4 / 10.4.3 / 10.5.0 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/PR:L/UI:N/S:U/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-2025-27933");

  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:"2025/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/28");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mattermost:mattermost_server");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mattermost_server_detect.nbin");
  script_require_keys("installed_sw/Mattermost Server");

  exit(0);
}

include('vcf.inc');
include('http.inc');

var port = get_http_port(default:80);

var app_info = vcf::get_app_info(app:'Mattermost Server', port:port, webapp:TRUE);

var constraints = [
  { 'min_version' : '9.11', 'fixed_version' : '9.11.9' },
  { 'min_version' : '10.3', 'fixed_version' : '10.3.4' },
  { 'min_version' : '10.4', 'fixed_version' : '10.4.3', 'fixed_display' : '10.4.3 / 10.5.0' }
];

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