Ech0 SSRF in Link Preview
2026-04-03
Unauthenticated server-side request forgery in Ech0's link preview endpoint allows remote attackers to force the application server to perform HTTP/HTTPS requests to arbitrary internal and external targets. The /api/website/title route requires no authentication, performs no URL validation, follows redirects by default, and disables TLS certificate verification (InsecureSkipVerify: true). Attackers can probe internal networks, access cloud metadata services (169.254.169.254), and trigger denial-
Unauthenticated Server-Side Request Forgery (SSRF) in Ech0's /api/website/title endpoint allows remote attackers to access internal network services, cloud metadata endpoints (AWS IMDSv1 at 169.254.169.254), and localhost-bound resources without authentication. The vulnerability accepts arbitrary URLs via the website_url parameter with zero validation, enabling attackers to probe internal infrastructure and exfiltrate partial response data through HTML title tag extraction. CVSS 7.2 reflects the