CVE-2024-52445 identifies a critical security vulnerability in the ModelTheme QRMenu Restaurant QR Menu Lite WordPress plugin, specifically versions up to and including 1.0.4. The vulnerability arises from unsafe deserialization of untrusted data, which allows an attacker to perform object injection. Deserialization is the process of converting data from a format suitable for storage or transmission back into an object in memory. When this process is performed on untrusted input without proper validation or sanitization, it can lead to the instantiation of malicious objects that execute arbitrary code or manipulate application logic. In this case, the plugin's deserialization mechanism does not adequately verify or sanitize incoming data, enabling attackers to craft malicious payloads that, when deserialized, can trigger unauthorized actions such as remote code execution, privilege escalation, or data tampering. This vulnerability affects the plugin versions from initial release through 1.0.4. Although no public exploits have been reported yet, the nature of object injection vulnerabilities in PHP-based WordPress plugins is well-known to be highly exploitable. The plugin is commonly used by restaurants to provide QR code-based digital menus, which means it is often exposed on public-facing websites. The lack of a CVSS score indicates that the vulnerability is newly disclosed, but the technical details and typical impact of deserialization flaws suggest a high severity level. The vulnerability was published on November 20, 2024, and no patches or fixes are currently linked, emphasizing the need for immediate attention by users of the plugin.

The exploitation of this vulnerability can have severe consequences for organizations using the affected plugin. Attackers can leverage the deserialization flaw to execute arbitrary code on the web server hosting the plugin, potentially gaining full control over the affected website. This can lead to data breaches, website defacement, unauthorized access to sensitive customer information, and the deployment of malware or ransomware. For restaurants relying on the QRMenu plugin, a successful attack could disrupt business operations, damage reputation, and lead to financial losses. Additionally, compromised websites can be used as a foothold for lateral movement within the hosting environment or as part of broader supply chain attacks. Given the plugin’s deployment in public-facing environments, the attack surface is broad, and automated exploitation attempts may increase once details become widely known. The absence of authentication requirements for exploitation (typical in deserialization vulnerabilities) further amplifies the risk. Overall, the impact spans confidentiality, integrity, and availability of affected systems.

1. Immediately monitor for updates or patches from ModelTheme addressing CVE-2024-52445 and apply them as soon as they become available. 2. Until a patch is released, consider disabling or uninstalling the QRMenu Restaurant QR Menu Lite plugin to eliminate exposure. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious serialized payloads or unusual POST requests targeting the plugin endpoints. 4. Conduct code reviews and audits to identify unsafe deserialization patterns and refactor code to use safer serialization methods or validate and sanitize all input before deserialization. 5. Restrict file and directory permissions on the web server to limit the impact of potential code execution. 6. Employ runtime application self-protection (RASP) tools to detect and prevent exploitation attempts in real time. 7. Monitor logs for anomalous activity indicative of exploitation attempts, such as unexpected object instantiation or unusual HTTP requests. 8. Educate site administrators on the risks of installing unverified plugins and encourage the use of security plugins that can detect vulnerabilities. 9. Regularly back up website data and configurations to enable rapid recovery in case of compromise.