CVE-2026-41191 HIGH

CVE-2026-41191: FreeScout's signature only mailbox permission allows unauthorized mailbox chat setting changes

Vendor Freescout-Help-Desk
Product freescout
Weakness CWE-863 · Incorrect authorization
Published April 21, 2026
Last update April 21, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 21, 2026 CVE published
April 21, 2026 Record updated

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