Semgrep Scan Exposes Critical SSRF Vulnerabilities in PHP Code, Exposing Internal Services

A Semgrep security scan has flagged critical Server-Side Request Forgery (SSRF) vulnerabilities in a PHP codebase, exposing internal services to potential attacker manipulation. The automated scan identified that user-controlled input is being passed directly to network functions without any validation, creating a direct path for an attacker to force the server to make unauthorized requests to internal infrastructure or arbitrary external hosts.

The specific findings center on the file `example-codes/index5.php`. On line 13, the user-controlled variable `$name` is passed directly to the `curl_init()` function. An identical vulnerability exists on line 14, where the variable `$code` is also used as the sole parameter for `curl_init`. This pattern represents a classic SSRF flaw, where an application blindly trusts user input to dictate network destinations, bypassing security boundaries.

This type of vulnerability is a significant security risk for any organization. Successful exploitation could allow attackers to probe and interact with internal services that are not exposed to the public internet, such as metadata services, databases, or administrative APIs. The automated nature of the finding, generated by a GitHub Actions workflow, underscores the persistent risk of such flaws slipping into production code without proper security guardrails and code review processes.