CVE-2026-41191CWE-863

FreeScout's signature only mailbox permission allows unauthorized mailbox chat setting changes

High · published April 21, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
26.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00340 · 26.2th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-04-21T17:09Z
EPSS history
Timeline
  • 21 APR 17:09Z
    FreeScout's signature only mailbox permission allows unauthorized mailbox chat setting changes
    cvelistv5