Overview
The recent discovery of a severe vulnerability, CVE-2025-39348, in the Grand Restaurant theme of WordPress has raised significant concerns about data security and the integrity of systems using this theme. This vulnerability allows for the deserialization of untrusted data, which can lead to object injection. The impact of this vulnerability is significant; it could potentially compromise the system or lead to data leakage. As such, it is crucial for businesses and organizations using the Grand Restaurant WordPress theme to understand this vulnerability and take appropriate actions to mitigate its risks.
Vulnerability Summary
CVE ID: CVE-2025-39348
Severity: Critical with a CVSS score of 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
ThemeGoods Grand Restaurant WordPress | Versions up to 7.0
How the Exploit Works
The vulnerability exists because the ThemeGoods Grand Restaurant WordPress theme does not properly validate user-supplied input before deserializing it. This allows an attacker to send serialized objects containing malicious data or code, which the system then deserializes and executes. This could allow an attacker to execute arbitrary code, modify data, or even take complete control of the affected system.
Conceptual Example Code
This conceptual example demonstrates how an attacker might exploit the vulnerability. This could be done via a POST request to a vulnerable endpoint, containing a serialized object with malicious data.
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "serialized_object": "O:10:\"malicious\":1:{s:4:\"code\";s:32:\"payload_that_executes_arbitrary_code\";}" }The serialized object (`serialized_object`) contains a malicious class (`malicious`) with a property (`code`) that contains the payload to be executed when the object is deserialized.
It is worth noting that this is a simplified example. In a real-world scenario, the payload would likely be more complex and designed to exploit specific vulnerabilities in the targeted system.