EUVD-2025-22477

Comprehensive Technical Analysis of EUVD-2025-22477

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the Ebook Store plugin for WordPress, identified as EUVD-2025-22477 (CVE-2025-7437), allows for arbitrary file uploads due to missing file type validation in the ebook_store_save_form function. This flaw affects all versions up to and including 5.8012. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, which is considered critical.

CVSS Vector Breakdown:

• Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No authentication is required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability can lead to a significant breach of confidentiality.
• Integrity (I): High (H) - The vulnerability can lead to a significant breach of integrity.
• Availability (A): High (H) - The vulnerability can lead to a significant breach of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated File Upload: An attacker can upload arbitrary files, including malicious scripts, without needing to authenticate.
• Remote Code Execution (RCE): By uploading a malicious PHP file, an attacker can execute arbitrary code on the server, leading to full control over the affected system.

Exploitation Methods:

• Direct File Upload: An attacker can craft a malicious request to the ebook_store_save_form function, bypassing the missing file type validation to upload a PHP file.
• Web Shell Upload: An attacker can upload a web shell, allowing them to execute commands on the server remotely.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress installations using the Ebook Store plugin.

Affected Software Versions:

• Ebook Store plugin versions up to and including 5.8012.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the Ebook Store plugin is updated to a version higher than 5.8012, where the vulnerability has been patched.
• Disable the Plugin: If an update is not immediately available, consider disabling the plugin until a fix is released.

Long-Term Mitigation:

• Implement File Upload Validation: Ensure that all file uploads are validated for type and content.
• Regular Security Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• Use Security Plugins: Employ security plugins like Wordfence to monitor and protect against such vulnerabilities.

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 Ebook Store plugin. The potential for remote code execution can lead to data breaches, unauthorized access, and system compromise, affecting the confidentiality, integrity, and availability of information.

Regulatory Implications:

• GDPR Compliance: Organizations must ensure that they comply with GDPR regulations by protecting personal data from unauthorized access.
• Incident Reporting: Organizations must be prepared to report any security incidents to relevant authorities and affected individuals.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: ebook_store_save_form
• Issue: Missing file type validation allows arbitrary file uploads.
• Location: functions.php at line 2442 (as per the reference).

Detection and Response:

• Log Analysis: Monitor server logs for unusual file upload activities.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious file upload attempts.
• Patch Management: Ensure that all plugins and WordPress core are kept up-to-date with the latest security patches.

References:

• Wordfence Threat Intelligence
• WordPress Plugin Repository
• WordPress Changeset

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