CVE-2026-41191

HIGH 7.1

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

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-863
Vendor	freescout-help-desk
Product	freescout
Published	Apr 21, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Affected Versions

freescout-help-desk / freescout

< 1.8.215

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wpv9-c2gv-2j82 github.com: https://github.com/freescout-help-desk/freescout/commit/fb130de64e1c830d85dd6988eaa08d725a7be954 github.com: https://github.com/freescout-help-desk/freescout/releases/tag/1.8.215