A Server-Side Request Forgery vulnerability in Hi.Events could allow an authenticated attacker to perform unauthorized requests to internal or external services.

The application is vulnerable to Server-Side Request Forgery (CWE-918) due to unvalidated webhook redirects. An authenticated attacker can manipulate the application to send requests to internal network resources, potentially bypassing perimeter security.

With a CVSS score of 8.5, this vulnerability represents a significant risk. An attacker could use the application as a proxy to probe internal networks, interact with internal APIs, or exfiltrate sensitive data, leading to potential unauthorized access and information disclosure.

Immediate Action: Update to version 1.11.1-beta or later, which contains the necessary fixes to prevent unvalidated webhook redirects.

Proactive Monitoring: Monitor egress traffic from the application server for unusual connections to internal IP addresses or restricted ports.

Compensating Controls: Deploy a Web Application Firewall (WAF) to block requests containing suspicious redirect patterns or attempts to access internal loopback addresses.

Public Exploit Available: Unknown

This SSRF vulnerability poses a high risk to internal infrastructure security. It is essential that administrators apply the provided fix immediately to prevent potential exploitation of internal network resources.