Medium
FreeScout has HTML Injection in Outgoing Emails via Unsanitized Customer Name in Signature Variables
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40567
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 18:29 UTC · Revision 1
Source evidence
FreeScout has HTML Injection in Outgoing Emails via Unsanitized Customer Name in Signature Variables
core-osv · Original sourcePublished 21 Apr 2026, 16:06 UTC
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.
osv:CVE-2026-40567
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2026-40567",
"method": "structured",
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"title": "FreeScout has HTML Injection in Outgoing Emails via Unsanitized Customer Name in Signature Variables",
"summary": "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.",
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"modified": "2026-10-28T02:30:38.334723017Z",
"provider": "osv",
"references": [
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