Overview
In this blog post, we will delve into the details of a critical cybersecurity vulnerability that has been identified in the Drupal Restrict route by IP module. This vulnerability, officially classified as CVE-2025-47701, centers around a Cross-Site Request Forgery (CSRF) attack. Drupal, a widely used content management system (CMS), is known for its robustness and flexibility. However, the discovery of this vulnerability underscores the importance of constant vigilance in the cybersecurity landscape. This issue affects a significant number of websites, possibly compromising their security and data integrity, hence the need for immediate attention and remediation.
Vulnerability Summary
CVE ID: CVE-2025-47701
Severity: High (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Drupal Restrict route by IP | 0.0.0 – 1.2.9
How the Exploit Works
The exploit takes advantage of a CSRF vulnerability in the Drupal Restrict route by IP module. CSRF vulnerabilities allow an attacker to force an unsuspecting user to perform actions on a web application in which they’re authenticated. In this case, an attacker can trick a Drupal user into making an unintended request, potentially leading to unauthorized changes in the system settings or data leakage. The attacker can then gain access to sensitive data or manipulate the system as per their malicious intent.
Conceptual Example Code
Here is a conceptual example of how this vulnerability might be exploited. An attacker could create a malicious webpage or email that sends a POST request when visited or opened by the target. The malicious request might look something like this:
POST /drupal/restrict_by_ip/ HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
csrf_token=...&ip_to_unrestrict=...In the above example, the “csrf_token” is the user’s CSRF token (which the attacker would need to obtain), and “ip_to_unrestrict” is the IP address that the attacker wants to unrestrict.
Mitigation and Recommendations
Drupal has released a patch to address this vulnerability, and it is strongly recommended that all users of the affected versions apply this patch immediately. The patch ensures that proper CSRF protections are in place, preventing the exploitation of this vulnerability.
For those unable to apply the patch immediately, a temporary mitigation can be to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS). However, these are temporary measures and cannot substitute the security provided by applying the vendor-released patch.
In addition to patching, it is recommended to follow best practices for secure coding to prevent similar vulnerabilities in the future. This includes validating all inputs, implementing proper session management, and routinely conducting security audits of your applications.