CVE-2026-40567
MEDIUMFreeScout has HTML Injection in Outgoing Emails via Unsanitized Customer Name in Signature Variables
Title source: cnaDescription
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.
Scores
CVSS v3
5.8
EPSS
0.0003
EPSS Percentile
10.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Details
CWE
CWE-116
Status
published
Products (1)
freescout-help-desk/freescout
< 1.8.213
Published
Apr 21, 2026
Tracked Since
Apr 21, 2026