EUVD-2025-38238

Comprehensive Technical Analysis of EUVD-2025-38238

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2025-38238 pertains to the Gravity Forms plugin for WordPress, specifically affecting versions up to and including 2.9.20. The issue arises from a lack of file type validation in the copy_post_image() function, which allows unauthenticated attackers to upload arbitrary files to the server. This can potentially lead to remote code execution (RCE), making it a critical vulnerability.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates that the vulnerability is severe, with a significant impact on confidentiality, integrity, and availability. The attack vector is network-based (AV:N), requires low complexity (AC:L), no privileges (PR:N), and no user interaction (UI:N). The scope is unchanged (S:U), and the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated File Upload: Attackers can exploit the vulnerability by uploading malicious files through the post creation form if it includes a file upload field.
• Remote Code Execution (RCE): By uploading executable files (e.g., PHP scripts), attackers can execute arbitrary code on the server, leading to full system compromise.

Exploitation Methods:

• File Upload: Attackers can craft a specially designed file upload request to bypass the missing file type validation.
• Code Execution: Once a malicious file is uploaded, attackers can trigger its execution, potentially gaining control over the server.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress sites using the Gravity Forms plugin.

Affected Software Versions:

• Gravity Forms plugin versions up to and including 2.9.20.

Conditions for Exploitation:

• The allow_url_fopen setting must be enabled (On).
• The post creation form must be enabled with a file upload field.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Upgrade to the latest version of the Gravity Forms plugin that includes the security patch.
• Disable File Uploads: Temporarily disable file uploads in the post creation form until the plugin is updated.
• Disable allow_url_fopen: Set allow_url_fopen to Off in the PHP configuration to mitigate the risk.

Long-Term Strategies:

• Regular Updates: Ensure all plugins and WordPress core are regularly updated.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against vulnerabilities.
• File Upload Validation: Implement additional file type validation and sanitization for all file uploads.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using WordPress with the Gravity Forms plugin. Given the widespread use of WordPress, the potential for widespread exploitation is high, which could lead to data breaches, unauthorized access, and service disruptions. This underscores the importance of timely patching and proactive security measures in the European cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerable Function:

• copy_post_image() in forms_model.php

Code Snippet:

// forms_model.php
function copy_post_image($file) {
    // Missing file type validation
    copy($file['tmp_name'], $file['name']);
}

References:

• NVD Entry: CVE-2025-12352
• GitHub Source Code:
  • forms_model.php
  • class-gf-field-fileupload.php
• Wordfence Threat Intel: Vulnerability Details

Aliases:

• CVE-2025-12352
• GHSA-8ff8-c7j7-c996

Assigner:

• Wordfence

ENISA IDs:

• Product: Gravity Forms (versions ≤2.9.20)
• Vendor: Gravity Forms

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their digital assets.