WordPress < 5.1.1 Multiple Vulnerabilities

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(122823);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/14");

  script_cve_id("CVE-2019-9787");
  script_bugtraq_id(107411);

  script_name(english:"WordPress < 5.1.1 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"A PHP application running on the remote web server is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the WordPress
application running on the remote web server is affected by 
multiple vulnerabilities:

  - A cross-site request forgery (XSRF) vulnerability
    exists in the comment form due to improper validation. A
    remote attacker can exploit this by tricking a user into
    visiting a specially crafted web page, allowing the
    attacker to create comments on the administrator's
    behalf. (CVE-2019-9787)

  - A cross-site scripting (XSS) vulnerability exists due
    to improper validation of user-supplied input before
    returning it to users. An unauthenticated, remote
    attacker can exploit this, by convincing a user to
    click a specially crafted URL, to execute arbitrary
    script code in a user's browser session.");
  # https://wordpress.org/support/wordpress-version/version-5-1-1
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?34dc1be1");
  script_set_attribute(attribute:"solution", value:
"Upgrade to WordPress version 5.1.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9787");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/14");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  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) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("wordpress_detect.nasl");
  script_require_keys("www/PHP", "installed_sw/WordPress", "Settings/ParanoidReport");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

app = "WordPress";
port = get_http_port(default:80, php:TRUE);

app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:2);

# Per https://wordpress.org/download/release-archive/
# only 5.1.1 is supported but fix is backported to 3.9
constraints = [
  { "fixed_version":"3.9.27", "fixed_display" : "3.9.27 / 5.1.1" },
  { "min_version":"4.0", "fixed_version":"4.0.26", "fixed_display" : "4.0.26 / 5.1.1" },
  { "min_version":"4.1", "fixed_version":"4.1.26", "fixed_display" : "4.1.26 / 5.1.1" },
  { "min_version":"4.2", "fixed_version":"4.2.23", "fixed_display" : "4.2.23 / 5.1.1" },
  { "min_version":"4.3", "fixed_version":"4.3.19", "fixed_display" : "4.3.19 / 5.1.1" },
  { "min_version":"4.4", "fixed_version":"4.4.18", "fixed_display" : "4.4.18 / 5.1.1" },
  { "min_version":"4.5", "fixed_version":"4.5.17", "fixed_display" : "4.5.17 / 5.1.1" },
  { "min_version":"4.6", "fixed_version":"4.6.14", "fixed_display" : "4.6.14 / 5.1.1" },
  { "min_version":"4.7", "fixed_version":"4.7.13", "fixed_display" : "4.7.13 / 5.1.1" },
  { "min_version":"4.8", "fixed_version":"4.8.9",  "fixed_display" : "4.8.9 / 5.1.1" },
  { "min_version":"4.9", "fixed_version":"4.9.10", "fixed_display" : "4.9.10 / 5.1.1" },
  { "min_version":"5.0", "fixed_version":"5.0.4", "fixed_display" : "5.0.4 / 5.1.1" },
  { "min_version":"5.1", "fixed_version":"5.1.1" }
];

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