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 codebase, where unvalidated user input is directly passed to network functions. This flaw allows an attacker to potentially force the server to make unauthorized requests to internal services or arbitrary external hosts, a classic vector for data exfiltration and internal network probing.

The automated scan identified two specific instances in the file `example-codes/index.php`. On lines 25 and 26, user-controlled variables `$name` and `$code` are fed directly into the `curl_init()` function without any sanitization or validation. This creates a direct taint path where an attacker can manipulate these inputs to control the destination of the cURL request, effectively turning the server into a proxy for malicious network calls.

SSRF vulnerabilities are particularly dangerous as they can bypass firewall protections and access sensitive internal infrastructure not exposed to the public internet. The presence of this pattern in multiple lines suggests a systemic lack of input validation for network operations within the scanned code. While the issue is flagged automatically, it requires immediate developer attention to implement proper input whitelisting, URL validation, or network access controls to mitigate the risk of internal service compromise.