Zimbra Collaboration Server 10.1.x < 10.1.20 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(329328);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/27");

  script_cve_id("CVE-2026-10631", "CVE-2026-50054", "CVE-2026-50055");
  script_xref(name:"IAVA", value:"2026-A-0761");

  script_name(english:"Zimbra Collaboration Server 10.1.x < 10.1.20 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a web application that is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, Zimbra Collaboration Server is affected by multiple vulnerabilities
including:

  - A security issue in the EWS extension related to access controls. (CVE-2026-10631)

  - An authorization issue in mailbox delegation. (CVE-2026-50054)

  - A mail forwarding restriction bypass that could allow authenticated users to exfiltrate email despite
    mail forwarding restrictions being enabled. (CVE-2026-50055)

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://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.20");
  script_set_attribute(attribute:"see_also", value:"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories");
  script_set_attribute(attribute:"solution", value:
"Upgrade to version 10.1.20 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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-2026-50055");

  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:"2026/07/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/24");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:zimbra:collaboration_suite");
  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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("zimbra_web_detect.nbin", "zimbra_nix_installed.nbin");
  script_require_keys("installed_sw/zimbra_zcs");

  exit(0);
}

include('vcf_extras.inc');

var app_info = vcf::zimbra::combined_get_app_info();

var constraints = [
  {'min_version':'10.1', 'fixed_version':'10.1.20'}
];

vcf::zimbra::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_WARNING,
  flags:{'xss':TRUE}
);