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OpenAdvisories
Medium · 6.1 CVE-2026-107393 EUVD-2026-95211

FreeScout: Stored HTML Injection in Administrator Alert Emails via Spoofed CF-Connecting-IP Header

Published Oct 8, 2026 · Updated Oct 14, 2026 · Assigned by GitHub_M

Description

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.235, when APP_CLOUDFLARE_IS_USED is enabled, FreeScout trusts an unvalidated CF-Connecting-IP header during failed login attempts and stores the spoofed value in the activity log. LogsMonitor inserts the value into an administrator alert email without HTML escaping, allowing injected HTML to execute when an administrator opens the email. This issue is fixed in version 1.8.235.

Affected products

VendorProductAffectedFixed
freescout-help-desk freescout < 1.8.235 —

References