EUVD-2025-19951

Comprehensive Technical Analysis of EUVD-2025-19951

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified as EUVD-2025-19951 (CVE-2025-28951) pertains to an "Unrestricted Upload of File with Dangerous Type" in the CreedAlly Bulk Featured Image plugin. This vulnerability allows an attacker to upload a web shell to a web server, potentially leading to full server compromise. The CVSS (Common Vulnerability Scoring System) base score of 9.1 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): High (H) - The attacker needs high-level privileges to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Changed (C) - The vulnerability affects a different security scope.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves uploading a malicious file, such as a web shell, through the Bulk Featured Image plugin. An attacker with high-level privileges can exploit this vulnerability by:

1. Uploading a Web Shell: The attacker uploads a PHP file or another executable script that acts as a web shell.
2. Executing Commands: Once the web shell is uploaded, the attacker can execute arbitrary commands on the server, leading to full control over the system.
3. Data Exfiltration: The attacker can exfiltrate sensitive data, modify files, or install additional malware.

3. Affected Systems and Software Versions

The vulnerability affects the CreedAlly Bulk Featured Image plugin versions from n/a through 1.2.1. Any WordPress site using this plugin within the specified version range is at risk.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps should be taken:

1. Update the Plugin: Immediately update the Bulk Featured Image plugin to a version that addresses this vulnerability.
2. Implement File Upload Restrictions: Ensure that the plugin enforces strict file type and size restrictions for uploads.
3. Regular Security Audits: Conduct regular security audits and vulnerability assessments of all plugins and software in use.
4. Monitor for Suspicious Activity: Implement monitoring tools to detect and alert on suspicious file uploads or unusual server activity.
5. Limit User Privileges: Ensure that only trusted users have high-level privileges and limit the number of users with such access.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the affected plugin. The potential for full server compromise can lead to data breaches, financial loss, and reputational damage. Given the widespread use of WordPress and its plugins, this vulnerability underscores the importance of timely patching and regular security assessments.

6. Technical Details for Security Professionals

Detection:

• File Integrity Monitoring: Use file integrity monitoring tools to detect unauthorized file changes.
• Web Application Firewalls (WAF): Deploy WAFs to block suspicious upload attempts.
• Log Analysis: Regularly analyze server logs for signs of unauthorized file uploads or command execution.

Response:

• Incident Response Plan: Have a well-defined incident response plan in place to quickly address any detected exploitation.
• Backup and Recovery: Ensure that regular backups are taken and that a recovery plan is in place to restore systems in case of compromise.

Prevention:

• Secure Coding Practices: Ensure that plugins and software are developed following secure coding practices.
• Regular Updates: Keep all software and plugins up to date with the latest security patches.

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