EUVD-2025-19896

Comprehensive Technical Analysis of EUVD-2025-19896

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-19896 pertains to an "Unrestricted Upload of File with Dangerous Type" in the WPCenter AiBud WP plugin. This vulnerability allows an attacker to upload a web shell to a web server, potentially leading to full control over the server. 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 and 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) - The vulnerability results in a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability results in a high impact on integrity.
• Availability (A): High (H) - The vulnerability results in a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves uploading a malicious file, such as a web shell, to the web server. This can be achieved through the following steps:

1. Identify the Vulnerable Plugin: The attacker identifies a WordPress site using the vulnerable AiBud WP plugin (versions n/a through 1.8.5).
2. Exploit the Vulnerability: The attacker uploads a web shell or other malicious file through the plugin's file upload functionality.
3. Gain Control: Once the web shell is uploaded, the attacker can execute arbitrary commands on the server, leading to full control.

3. Affected Systems and Software Versions

The vulnerability affects the AiBud WP plugin versions from n/a through 1.8.5. Any WordPress site using this plugin within the specified version range is at risk.

4. Recommended Mitigation Strategies

1. Update the Plugin: Immediately update the AiBud WP plugin to a version that addresses this vulnerability.
2. Disable File Uploads: Temporarily disable file upload functionality until the plugin is updated.
3. Implement Web Application Firewalls (WAF): Use WAFs to monitor and block suspicious file uploads.
4. Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
5. User Education: Educate users about the risks of uploading files and the importance of keeping plugins updated.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using the affected plugin. Given the critical nature of the vulnerability, successful exploitation could lead to data breaches, unauthorized access, and potential disruption of services. This underscores the importance of timely patch management and continuous monitoring of web applications.

6. Technical Details for Security Professionals

• Vulnerability Type: Unrestricted Upload of File with Dangerous Type
• Affected Plugin: AiBud WP
• Affected Versions: n/a through 1.8.5
• Exploitation Method: Uploading a web shell or other malicious file
• Mitigation: Update to the latest version of the plugin, implement WAFs, and conduct regular security audits
• References: Patchstack Vulnerability Report

Conclusion

The vulnerability described in EUVD-2025-19896 is critical and requires immediate attention from organizations using the affected AiBud WP plugin. By implementing the recommended mitigation strategies and maintaining vigilant security practices, organizations can significantly reduce the risk of exploitation and protect their digital assets.