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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-107393

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-107393

freescout

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "freescout-help-desk",
    "product": "freescout",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.8.235"
      }
    ]
  }
]
Related CVEs
CVE-2026-107393

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#21332 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement