EUVD-2025-5070

Comprehensive Technical Analysis of EUVD-2025-5070

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the Everest Forms plugin for WordPress, identified as EUVD-2025-5070, allows for arbitrary file upload, read, and deletion due to insufficient file type and path validation in the 'format' method of the EVF_Form_Fields_Upload class. This vulnerability affects all versions up to and including 3.0.9.4. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, indicating a critical risk.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No authentication is needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:U (Unchanged Scope): The vulnerability does not change the security scope.
• C:H (High Confidentiality Impact): Sensitive information disclosure is possible.
• I:H (High Integrity Impact): The integrity of the system can be compromised.
• A:H (High Availability Impact): The availability of the system can be affected.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Arbitrary File Upload: An attacker can upload malicious files to the server, potentially leading to remote code execution (RCE).
• Arbitrary File Read: An attacker can read sensitive files on the server, leading to information disclosure.
• Arbitrary File Deletion: An attacker can delete critical files, causing denial of service (DoS) or site takeover.

Exploitation Methods:

• Unauthenticated Access: The attacker can exploit the vulnerability without needing any credentials.
• Crafted Requests: The attacker can send specially crafted HTTP requests to the vulnerable endpoint to upload, read, or delete files.
• Automated Scripts: Attackers can use automated scripts to scan for vulnerable installations and exploit them en masse.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress sites using the Everest Forms plugin.

Affected Software Versions:

• Everest Forms plugin versions up to and including 3.0.9.4.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the Everest Forms plugin is updated to the latest version that includes the security patch.
• Disable the Plugin: If an update is not immediately available, consider disabling the plugin until a fix is released.

Long-Term Mitigations:

• Regular Updates: Implement a regular update schedule for all plugins and themes.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against vulnerabilities.
• Web Application Firewall (WAF): Deploy a WAF to block malicious requests and protect against known vulnerabilities.
• File Integrity Monitoring: Implement file integrity monitoring to detect unauthorized changes to files.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using WordPress with the Everest Forms plugin. Given the widespread use of WordPress, this vulnerability could lead to large-scale attacks, including data breaches, site takeovers, and service disruptions. The high severity score and the ease of exploitation make it a critical concern for cybersecurity professionals and organizations across Europe.

6. Technical Details for Security Professionals

Vulnerable Code:

• The vulnerability resides in the EVF_Form_Fields_Upload class, specifically in the 'format' method.
• The lack of proper validation for file types and paths allows for arbitrary file operations.

Patch Details:

• The patch involves adding proper validation checks to ensure that only authorized file types and paths are processed.
• The fix can be reviewed in the GitHub commit: 7d37858d2c614aa107b0f495fe50819a3867e7f5.

References:

• Wordfence Threat Intel
• GitHub Commit
• WordPress Trac Changeset

Conclusion: This vulnerability highlights the importance of regular updates and robust security practices in maintaining the integrity and availability of web applications. Cybersecurity professionals should prioritize addressing this vulnerability to mitigate potential risks and ensure the security of their systems.