Mattermost Server 9.11.x < 9.11.12 / 10.5.x < 10.5.3 Multiple Vulnerabilities (MMSA-2025-00455, MMSA-2025-00456)

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

include('compat.inc');

if (description)
{
  script_id(237101);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/05");

  script_cve_id("CVE-2025-2527", "CVE-2025-2570");
  script_xref(name:"IAVA", value:"2025-A-0361-S");

  script_name(english:"Mattermost Server 9.11.x < 9.11.12 / 10.5.x < 10.5.3 Multiple Vulnerabilities (MMSA-2025-00455, MMSA-2025-00456)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The version of Mattermost Server installed on the remote host is prior to 9.11.12 or 10.5.3. It is, therefore, affected
by multiple vulnerabilities as referenced in the MMSA-2025-00455_00456 advisory.

  - Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions
    when accessing groups, which allows an attacker to view group information via an API request.
    (CVE-2025-2527)

  - Mattermost versions 10.5.x <= 10.5.3, 9.11.x <= 9.11.11 fail to check `RestrictSystemAdmin` setting if
    user doesn't have access to `ExperimentalSettings` which allows a System Manager to access
    `ExperimentSettings` when `RestrictSystemAdmin` is true via System Console. (CVE-2025-2570)

Note that Nessus has not tested for these issues 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 9.11.12 / 10.5.3 or later.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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-2025-2527");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/04/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/04/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/22");

  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');

var app_info = vcf::combined_get_app_info(app:'Mattermost Server');

var constraints = [
  { 'min_version' : '9.11', 'fixed_version' : '9.11.12' },
  { 'min_version' : '10.5', 'fixed_version' : '10.5.3' }
];

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