EUVD-2025-20009

Comprehensive Technical Analysis of EUVD-2025-20009

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-20009 pertains to a Deserialization of Untrusted Data issue in the WooCommerce Product Multi-Action plugin, which allows for Object Injection. This vulnerability is particularly severe due to its potential to enable remote code execution (RCE) and other critical impacts.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS:3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The CVSS score of 9.8 indicates a critical vulnerability. The vector string breaks down as follows:

• AV:N (Network): The vulnerability is exploitable over the network.
• AC:L (Low): The attack complexity is low, meaning it is relatively easy to exploit.
• PR:N (None): No privileges are required to exploit the vulnerability.
• UI:N (None): No user interaction is required.
• S:U (Unchanged): The scope is unchanged.
• C:H (High): Confidentiality impact is high.
• I:H (High): Integrity impact is high.
• A:H (High): Availability impact is high.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker can send specially crafted serialized data to the vulnerable endpoint, leading to the execution of arbitrary code on the server.
• Data Manipulation: The attacker can manipulate the deserialized objects to alter the application's state or data.
• Privilege Escalation: By injecting malicious objects, an attacker could gain elevated privileges within the application.

Exploitation Methods:

• Crafted Payloads: An attacker can create serialized payloads that, when deserialized, execute malicious code.
• Automated Tools: Exploitation frameworks and scripts can be used to automate the attack process.

3. Affected Systems and Software Versions

Affected Software:

• WooCommerce Product Multi-Action Plugin: Versions from n/a through 1.3.

Affected Systems:

• WordPress Websites: Any WordPress installation using the vulnerable versions of the WooCommerce Product Multi-Action plugin.
• E-commerce Platforms: Specifically, WooCommerce-based online stores.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Plugin: Ensure that the WooCommerce Product Multi-Action plugin is updated to a version that addresses this vulnerability.
• Disable Plugin: If an update is not available, consider disabling the plugin until a fix is released.

Long-Term Mitigations:

• Input Validation: Implement strict input validation and sanitization to prevent untrusted data from being deserialized.
• Use Secure Deserialization Libraries: Utilize libraries that provide secure deserialization mechanisms.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• Web Application Firewalls (WAF): Deploy WAFs to monitor and block suspicious traffic patterns.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for e-commerce platforms and small to medium-sized businesses (SMBs) that rely on WooCommerce. The potential for data breaches, financial loss, and reputational damage is high.

Regulatory Compliance:

• GDPR: Organizations must ensure they comply with GDPR regulations, especially regarding data protection and breach notification.
• Cybersecurity Directives: Adherence to EU cybersecurity directives and guidelines is crucial to mitigate such vulnerabilities.

6. Technical Details for Security Professionals

Technical Overview:

• Deserialization Process: The vulnerability arises from the deserialization of untrusted data, which can lead to the injection of malicious objects.
• Object Injection: The injection of objects can result in the execution of arbitrary code, manipulation of application data, or other malicious activities.

Detection and Monitoring:

• Log Analysis: Monitor server logs for unusual deserialization activities or error messages related to deserialization.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious network traffic patterns.
• Code Review: Conduct thorough code reviews to identify and rectify insecure deserialization practices.

Patching and Updates:

• Vendor Notifications: Stay updated with vendor notifications and patches.
• Automated Patch Management: Use automated tools to ensure timely application of security patches.

Conclusion: The Deserialization of Untrusted Data vulnerability in the WooCommerce Product Multi-Action plugin is critical and requires immediate attention. Organizations should prioritize updating the plugin, implementing robust security measures, and ensuring compliance with regulatory standards to mitigate the risk effectively.

References:

• Patchstack Vulnerability Database
• CVE ID: CVE-2025-49417
• Assigner: Patchstack
• ENISA ID Product: f587cc27-adaf-328b-9caa-6eef732367b4
• ENISA ID Vendor: 4eb44c04-67e9-3b7a-ac55-ecb572ace3f5