PT-2026-34011 · Freescout · Freescout

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

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions FreeScout versions prior to 1.8.213

Description An unauthenticated attacker can inject arbitrary HTML into outgoing emails 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 the embedding of phishing links, tracking pixels, and spoofed content inside legitimate support emails sent from the organization address.

Recommendations Update to version 1.8.213.

Exploit

Fix

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-116

Related Identifiers

CVE-2026-40567

Affected Products

Freescout

References · 6

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