CVE-2026-107393 — FreeScout: Stored HTML Injection in Administrator Alert Emails via Spoofed CF-Connecting-IP Header
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…
Published: 2026-10-08 · CVSS: 6.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7