PT-2026-34011 · Freescout Help Desk · Freescout

Published 2026-04-21 · Updated 2026-04-21 · CVE-2026-40567

NVD

CVSS v3.1

5.8

Medium

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, an unauthenticated attacker can inject arbitrary HTML into outgoing emails generated by FreeScout by sending an email with a crafted From display name. The name is stored in the database without sanitization and rendered unescaped into outgoing reply emails via the {%customer.fullName%} signature variable. This allows embedding phishing links, tracking pixels, and spoofed content inside legitimate support emails sent from the organization's address. Version 1.8.213 fixes the issue.

Fix

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-116

Related Identifiers

CVE-2026-40567

Affected Products

Freescout

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-40567 · Security Note
• https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213 · Note
• https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-q8v4-v62h-5528 · Note
• https://twitter.com/CVEnew/status/2046636256822444255 · Twitter Post
• https://github.com/freescout-help-desk/freescout/commit/9131b16f80eade81002cb9809a2603f6b61981cf · Note
• https://twitter.com/infoflowcloud/status/2046637652208656457 · Twitter Post