EUVD-2025-15760

Comprehensive Technical Analysis of EUVD-2025-15760

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-15760 pertains to a Deserialization of Untrusted Data issue in the Smart Sections Theme Builder - WPBakery Page Builder Addon. This vulnerability is classified with a Base Score of 9.8 under CVSS version 3.1, indicating a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• 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 special privileges are needed 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.

Given the high scores in confidentiality, integrity, and availability, this vulnerability poses a severe risk to systems using the affected software.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is the deserialization of untrusted data. An attacker can exploit this by:

• Crafting Malicious Input: An attacker can send specially crafted serialized data to the application.
• Object Injection: The deserialization process can be manipulated to inject malicious objects, leading to arbitrary code execution.
• Remote Code Execution (RCE): By exploiting the deserialization vulnerability, an attacker can execute arbitrary code on the server, potentially leading to full system compromise.

3. Affected Systems and Software Versions

The vulnerability affects the Smart Sections Theme Builder - WPBakery Page Builder Addon from version n/a through 1.7.8. This means that any system running this plugin within the specified version range is at risk.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Update Software: Immediately update the Smart Sections Theme Builder - WPBakery Page Builder Addon to a version higher than 1.7.8, if available.
• Input Validation: Implement strict input validation to ensure that only trusted data is deserialized.
• Disable Unnecessary Features: Disable any features or functionalities that are not required, reducing the attack surface.
• Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to deserialization processes.
• Network Segmentation: Implement network segmentation to limit the spread of potential attacks.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of WordPress and its plugins. Many organizations, including small businesses, educational institutions, and government agencies, rely on WordPress for their web presence. The exploitation of this vulnerability can lead to data breaches, financial losses, and reputational damage.

6. Technical Details for Security Professionals

For security professionals, the following technical details are crucial:

• Vulnerability Type: Deserialization of Untrusted Data
• Affected Component: Smart Sections Theme Builder - WPBakery Page Builder Addon
• Exploitation Method: PHP Object Injection
• Detection: Monitor for unusual deserialization activities and unexpected code execution.
• Patching: Ensure that the plugin is updated to a patched version. If a patch is not available, consider disabling the plugin until a fix is released.
• References:
  • Patchstack Vulnerability Database
  • NVD CVE-2025-39410

By understanding the technical details and implementing the recommended mitigation strategies, organizations can significantly reduce the risk posed by this critical vulnerability.