EUVD-2025-15785

Comprehensive Technical Analysis of EUVD-2025-15785

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-15785 pertains to a Deserialization of Untrusted Data issue in the Grand Restaurant WordPress theme, 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 vector indicates that the vulnerability can be exploited over the network (AV:N) with low complexity (AC:L), requires no privileges (PR:N) or user interaction (UI:N), and has a high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). The scope is unchanged (S:U), meaning the vulnerability affects the same security authority.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Untrusted Data Deserialization: An attacker can send specially crafted serialized data to the vulnerable application.
• Object Injection: The deserialization process can be manipulated to inject malicious objects, leading to arbitrary code execution.

Exploitation Methods:

• Remote Code Execution (RCE): By injecting malicious objects, an attacker can execute arbitrary code on the server.
• Data Exfiltration: Sensitive data can be extracted by manipulating the deserialization process.
• Denial of Service (DoS): The server can be crashed or rendered unavailable by injecting objects that cause resource exhaustion.

3. Affected Systems and Software Versions

Affected Software:

• Grand Restaurant WordPress Theme
• Versions: n/a through 7.0

Vendor:

• ThemeGoods

All installations of the Grand Restaurant WordPress theme up to version 7.0 are vulnerable to this issue.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update: Ensure that the Grand Restaurant WordPress theme is updated to a version that addresses this vulnerability.
• Patch: Apply any available patches from ThemeGoods or Patchstack.
• Disable Deserialization: If possible, disable the deserialization of untrusted data.

Long-Term Mitigations:

• Input Validation: Implement strict input validation to ensure that only trusted data is deserialized.
• Security Plugins: Use security plugins that can detect and block malicious requests.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using the Grand Restaurant WordPress theme. Given the widespread use of WordPress and its themes, this vulnerability could be exploited to compromise numerous websites, leading to data breaches, financial losses, and reputational damage.

Regulatory Compliance:

• GDPR: Organizations must ensure that they comply with GDPR regulations, particularly in terms of data protection and breach reporting.
• NIS Directive: Critical infrastructure providers must adhere to the Network and Information Systems (NIS) Directive, ensuring robust cybersecurity measures are in place.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Process: The vulnerability arises from the deserialization of untrusted data, which can be manipulated to inject malicious objects.
• Object Injection: The injection of malicious objects can lead to arbitrary code execution, data exfiltration, and DoS attacks.

Detection and Monitoring:

• Log Analysis: Monitor server logs for unusual deserialization activities or unexpected object creation.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious deserialization attempts.
• Web Application Firewalls (WAF): Use WAFs to block malicious requests targeting the deserialization process.

Incident Response:

• Containment: Isolate affected systems to prevent further exploitation.
• Forensic Analysis: Conduct a thorough forensic analysis to determine the extent of the compromise.
• Remediation: Apply patches and updates, and ensure that all systems are secured against similar vulnerabilities.

References:

• Patchstack Vulnerability Report
• NVD CVE-2025-39348

By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risk of exploitation and ensure the security and integrity of their systems.