MantisBT 1.0.0 < 2.28.2 Dynamic Custom Textarea Field Reflected XSS (GHSA-j7v9-f46r-2rp4)

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

include('compat.inc');

if (description)
{
  script_id(315207);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/02");

  script_cve_id("CVE-2026-41897");
  script_xref(name:"IAVB", value:"2026-B-0122");

  script_name(english:"MantisBT 1.0.0 < 2.28.2 Dynamic Custom Textarea Field Reflected XSS (GHSA-j7v9-f46r-2rp4)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a cross-site scripting vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of MantisBT installed on the remote host is 1.0.0 or later but prior to 2.28.2. It is, therefore, affected
by a vulnerability:

  - MantisBT is Vulnerable to Reflected XSS in Rendering Dynamic Custom Textarea Field. (CVE-2026-41897)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://github.com/mantisbt/mantisbt/security/advisories/GHSA-j7v9-f46r-2rp4
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5adac9a");
  script_set_attribute(attribute:"solution", value:
"Upgrade to MantisBT version 2.28.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/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:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/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:L/VI:L/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-41897");

  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:"2026/05/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mantisbt:mantisbt");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

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

  script_dependencies("mantisbt_detect.nbin");
  script_require_keys("installed_sw/MantisBT");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

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

var app = 'MantisBT';

var port = get_http_port(default:80);

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

vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  {'min_version': '1.0.0', 'fixed_version': '2.28.2'}
];

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