EUVD-2025-9443

Comprehensive Technical Analysis of EUVD-2025-9443

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-9443 pertains to a Deserialization of Untrusted Data issue in the Sabuj Kundu CBX Poll plugin, which allows for Object Injection. This vulnerability is particularly severe due to its high CVSS (Common Vulnerability Scoring System) base score of 9.8, indicating a critical risk. 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:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required to exploit the vulnerability.
• S:U (Unchanged Scope): The vulnerability does not change the security scope.
• C:H (High Confidentiality Impact): There is a high impact on the confidentiality of the system.
• I:H (High Integrity Impact): There is a high impact on the integrity of the system.
• A:H (High Availability Impact): There is a high impact on the availability of the system.

Given these factors, the vulnerability poses a significant threat to systems running the affected versions of the CBX Poll plugin.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is the deserialization of untrusted data, which can lead to Object Injection. An attacker could exploit this by:

• Crafting Malicious Input: An attacker could send specially crafted serialized data to the application.
• Object Injection: Upon deserialization, the malicious data could instantiate objects that execute arbitrary code or perform unauthorized actions.
• Remote Code Execution (RCE): If the injected objects can execute system commands, the attacker could gain control over the server, leading to RCE.

3. Affected Systems and Software Versions

The vulnerability affects the CBX Poll plugin versions from n/a through 1.2.7. Any system running these versions of the plugin is at risk. This includes:

• WordPress Sites: Particularly those using the CBX Poll plugin.
• Web Servers: Hosting WordPress sites with the vulnerable plugin installed.

4. Recommended Mitigation Strategies

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

• Update the Plugin: Immediately update the CBX Poll plugin to a version that addresses this vulnerability.
• Input Validation: Ensure that all user inputs are properly validated and sanitized.
• Deserialization Safeguards: Implement safeguards to prevent the deserialization of untrusted data.
• Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to deserialization.
• Patch Management: Implement a robust patch management process to ensure timely updates of all plugins and software.

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. Key concerns include:

• Data Breaches: Potential for data breaches affecting confidentiality and integrity.
• Service Disruption: Possible disruption of services due to availability impacts.
• Compliance Issues: Non-compliance with data protection regulations such as GDPR if sensitive data is compromised.

6. Technical Details for Security Professionals

For security professionals, the following technical details are crucial:

• Vulnerability Type: Deserialization of Untrusted Data leading to Object Injection.
• Affected Component: CBX Poll plugin for WordPress.
• Exploitation: The vulnerability can be exploited by sending crafted serialized data to the application.
• Detection: Monitor for unusual deserialization activities and review logs for any suspicious patterns.
• Remediation: Apply the latest patches and updates for the CBX Poll plugin. Implement strict input validation and deserialization safeguards.

Conclusion

The vulnerability described in EUVD-2025-9443 is critical and requires immediate attention. Organizations using the affected versions of the CBX Poll plugin should prioritize updating to a secure version and implement additional security measures to mitigate the risk. The potential impact on the European cybersecurity landscape underscores the importance of vigilant monitoring and proactive security practices.

References

• NVD Entry
• Patchstack Analysis