What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-21 · updated 2026-06-17
• Weakness: CWE-863

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

• freescout-help-desk freescout: before 1.8.215

References

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

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