EUVD-2025-208125

Comprehensive Technical Analysis of EUVD-2025-208125

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the Listee theme for WordPress, identified as EUVD-2025-208125 (CVE-2025-12981), is a critical privilege escalation issue. The broken validation check in the listee-core plugin's user registration function allows unauthenticated attackers to register as Administrators by manipulating the user_role parameter. This vulnerability affects all versions up to and including 1.1.6.

Severity Evaluation:

• CVSS Base Score: 9.8
• CVSS 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 a severe vulnerability due to the following factors:

• Attack Vector (AV:N): Network-based attack, meaning it can be exploited remotely.
• Attack Complexity (AC:L): Low complexity, indicating that the attack is relatively easy to execute.
• Privileges Required (PR:N): No privileges are required, meaning unauthenticated users can exploit this vulnerability.
• User Interaction (UI:N): No user interaction is required.
• Scope (S:U): Unchanged, meaning the vulnerability does not affect other systems.
• Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three CIA triad components.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Registration: An attacker can exploit the vulnerability by registering a new user with the user_role parameter set to Administrator.
• Automated Scripts: Attackers can use automated scripts to register multiple Administrator accounts, potentially leading to a takeover of the WordPress site.

Exploitation Methods:

• Parameter Manipulation: The attacker manipulates the user_role parameter during the registration process to gain Administrator privileges.
• SQL Injection: Although not explicitly mentioned, the lack of proper sanitization could potentially open the door to SQL injection attacks, further compromising the database.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress sites using the Listee theme versions up to and including 1.1.6.

Software Versions:

• Listee theme versions ≤ 1.1.6
• Bundled listee-core plugin with the vulnerable user registration function.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update: Immediately update the Listee theme to a version higher than 1.1.6 if available.
• Disable Registration: Temporarily disable user registration until the issue is resolved.
• Monitoring: Implement monitoring for suspicious registration activities and unusual Administrator account creations.

Long-Term Actions:

• Patch Management: Ensure a robust patch management process to apply updates promptly.
• Code Review: Conduct a thorough code review of the listee-core plugin to identify and fix similar vulnerabilities.
• Security Plugins: Use security plugins like Wordfence to detect and block malicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the Listee theme. The potential for unauthenticated attackers to gain Administrator access can lead to data breaches, unauthorized modifications, and service disruptions. This underscores the importance of timely updates and robust security practices in the WordPress ecosystem.

6. Technical Details for Security Professionals

Vulnerable Code: The vulnerability is located in the listee-core-users.php file, specifically around line 928, where the user_role parameter is not properly sanitized.

Example Exploit: An attacker could send a crafted HTTP POST request to the registration endpoint with the user_role parameter set to Administrator.

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: vulnerable-wordpress-site.com
Content-Type: application/x-www-form-urlencoded

action=listee_register_user&username=attacker&password=password123&user_role=Administrator

Detection:

• Log Analysis: Monitor server logs for unusual registration activities.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious registration patterns.

Remediation:

• Sanitization: Ensure proper sanitization and validation of all user inputs, especially those related to user roles.
• Access Controls: Implement strict access controls and role-based permissions.

References:

• Wordfence Threat Intel
• ThemeForest Listee Theme
• Listee Core Users PHP File
• Listee Changelog
• NVD CVE-2025-12981

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of privilege escalation attacks and protect their WordPress sites from unauthorized access.