CVE-2025-39348 in Grand Restaurant Theme
Summary
by MITRE • 05/19/2025
Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Restaurant WordPress allows Object Injection.This issue affects Grand Restaurant WordPress: from n/a through 7.0.
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Analysis
by VulDB Data Team • 05/30/2025
The vulnerability identified as CVE-2025-39348 represents a critical deserialization flaw in the ThemeGoods Grand Restaurant WordPress theme that enables object injection attacks. This vulnerability falls under the CWE-502 category, specifically addressing the dangerous practice of deserializing untrusted data without proper validation or sanitization. The flaw exists within the theme's codebase and affects all versions from the initial release through version 7.0, creating a significant attack surface for malicious actors targeting WordPress installations.
The technical implementation of this vulnerability occurs when the theme processes user-supplied data through PHP's unserialize() function or similar deserialization mechanisms without adequate input validation. Attackers can craft malicious serialized objects that, when processed by the vulnerable theme, execute arbitrary code or manipulate the application's behavior. This type of vulnerability is particularly dangerous because it can be exploited to achieve remote code execution, privilege escalation, or data manipulation within the affected WordPress environment. The attack vector typically involves sending specially crafted data through HTTP parameters or form inputs that are then deserialized by the theme's code.
The operational impact of this vulnerability extends beyond simple exploitation as it can lead to complete system compromise when combined with other attack techniques. An attacker who successfully exploits this vulnerability could gain unauthorized access to the WordPress installation, potentially leading to data theft, defacement, or the installation of backdoors. The vulnerability affects the entire WordPress ecosystem where the Grand Restaurant theme is installed, making it a significant concern for website administrators who may not be aware of the specific threat. This type of vulnerability is particularly problematic in multi-site environments or when the theme is used in conjunction with other plugins that may also be vulnerable to similar attacks.
Mitigation strategies for this vulnerability should focus on immediate remediation through theme updates to version 7.1 or later, which presumably contains the necessary patches. Organizations should also implement input validation measures to prevent untrusted data from reaching deserialization functions, employ proper sanitization techniques for all user inputs, and consider implementing web application firewalls to detect and block malicious requests. Additionally, security monitoring should be enhanced to detect unusual patterns in deserialization activities, and regular security audits should be conducted to identify similar vulnerabilities in other components of the WordPress stack. The ATT&CK framework categorizes this vulnerability under T1203 - Exploitation for Client Execution and T1059 - Command and Scripting Interpreter, highlighting the potential for malicious code execution and system compromise through this specific attack vector.