Server-Side Request Forgery (SSRF) Template

Executive Summary:

This report addresses a critical security vulnerability related to Server-Side Request Forgery (SSRF) detected within our application. SSRF occurs when an attacker can manipulate server-side requests initiated by the application, leading to unauthorized access to internal systems, sensitive data exposure, or server compromise. This report aims to outline the vulnerability, its potential impact on our systems and users, and actionable recommendations for mitigation.

Description of the Vulnerability:

Server-Side Request Forgery (SSRF) vulnerabilities arise when the application allows attackers to control and manipulate server-side requests sent to internal or external resources. Attackers can exploit SSRF vulnerabilities to bypass access controls, interact with internal systems or services, and perform actions on behalf of the server, potentially leading to data exfiltration, service disruption, or server compromise.


The impact of Server-Side Request Forgery (SSRF) vulnerabilities can be severe, leading to various security risks, including unauthorized access to internal resources, data exposure, or service exploitation. Attackers can exploit SSRF vulnerabilities to access sensitive data, perform reconnaissance, or launch further attacks against internal systems or third-party services, leading to financial loss, reputational damage, or legal consequences.


The likelihood of exploitation depends on various factors, including the presence of SSRF-vulnerable functionalities within the application, the visibility of internal resources, and the attacker's ability to manipulate server-side requests. However, given the prevalence of SSRF vulnerabilities in web applications and the potential impact on system security, the risk associated with this vulnerability is significant if not properly mitigated.

Steps to Reproduce:

  1. Identify functionalities within the application that initiate server-side requests to external or internal resources, such as URL fetchers, image processors, or file uploaders.
  2. Intercept and manipulate server-side requests initiated by the application, such as changing URLs, IP addresses, or request parameters.
  3. Redirect server-side requests to internal network resources, such as localhost interfaces, private IP addresses, or internal hostnames, to assess the application's behavior.
  4. Monitor the application's response to the manipulated requests to determine if sensitive data is exposed, unauthorized access is granted, or server-side actions are performed on behalf of the attacker.

Recommendations for Developers:

  1. Implement Whitelisting: Restrict server-side requests to a whitelist of trusted and validated resources, domains, or IP addresses to prevent attackers from accessing unauthorized or internal resources.
  2. Use Endpoint Protection: Implement endpoint protection mechanisms, such as network firewalls, web application firewalls (WAF), or reverse proxies, to filter and sanitize server-side requests, blocking requests to potentially malicious or sensitive destinations.


Addressing the Server-Side Request Forgery (SSRF) vulnerability is crucial to protecting internal systems, sensitive data, and server integrity within our application. By implementing whitelisting mechanisms and endpoint protection measures, we can mitigate the risks associated with SSRF vulnerabilities and enhance the overall security posture of our application.