Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

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

High 7.1

In plain English

A high-severity incorrect authorization in freescout from freescout-help-desk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.2%top 88.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
freescout-help-desk	freescout	< 1.8.215

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

References

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