This vulnerability involves a server-side request forgery in the validateUrlForSSRF function of the file apps/web/app/api/logo/route.ts in calcom cal.diy versions 4.9.0 through 4.9.4. An attacker can remotely manipulate this function to cause the server to make unintended requests. The exploitability is rated as difficult, and the CVSS 4.0 vector indicates a network attack vector with high attack complexity and low privileges required. No official remediation or patch has been published by the vendor.

Successful exploitation could allow an attacker to induce the server to perform unauthorized requests to internal or external systems, potentially leading to information disclosure or interaction with internal services. However, the low CVSS score and high attack complexity reduce the likelihood and impact of exploitation. No known active exploitation in the wild has been reported.

No official patch or remediation is currently available from the vendor. Users should monitor vendor communications for updates. Given the complexity of exploitation and low severity, immediate urgent action is not mandated, but cautious use of affected versions is advised. Network-level controls to restrict outbound requests from the affected service may reduce risk.