CVE-2026-62054 in Yacht Rental Plugin
Summary
by MITRE • 10/10/2026
Unauthenticated PHP Object Injection in Yacht Rental <= 2.6 versions.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as an unauthenticated PHP object injection flaw within the Yacht Rental plugin, specifically affecting versions up to and including 2.6, represents a critical security deficiency that allows attackers to execute arbitrary code on vulnerable web servers without requiring valid credentials. This type of vulnerability stems from the improper handling of user-supplied input during the deserialization process in PHP applications. When an application accepts data from external sources such as HTTP requests or cookies and passes it directly into functions like unserialize() without adequate validation, sanitization, or integrity checks, it creates a pathway for malicious actors to inject crafted serialized objects. In the context of this specific plugin, the lack of authentication requirements means that any internet user can interact with these vulnerable endpoints, significantly lowering the barrier to entry for exploitation and increasing the likelihood of successful attacks against exposed instances.
From a technical perspective, PHP object injection exploits the internal workings of the language's serialization mechanism by leveraging magic methods such as __wakeup(), __destruct(), or __toString(). These special functions are automatically invoked when an object is being deserialized or destroyed. By injecting a serialized payload that references classes available within the application environment or its dependencies, an attacker can trigger these methods to perform unintended actions. If the vulnerable code path allows for file system operations, database queries, or command execution through these magic methods, the impact escalates from simple data manipulation to full remote code execution (RCE). This capability enables attackers to read sensitive configuration files containing database credentials, modify application settings, deface websites, or pivot further into the internal network infrastructure.
The operational impact of this vulnerability is severe due to its unauthenticated nature and potential for complete system compromise. Attackers can achieve persistent access by creating backdoors within the web root directory, leading to long-term unauthorized control over the server environment. Furthermore, because Yacht Rental deals with booking data and potentially customer information, successful exploitation may also result in significant data breaches involving personally identifiable information (PII) or payment details, violating privacy regulations such as GDPR or CCPA. The absence of authentication requirements means that automated scanning tools can rapidly identify vulnerable instances across the internet, leading to widespread compromise if left unpatched. This aligns with Common Weakness Enumeration identifier CWE-502, which describes deserialization of untrusted data, a category known for its high severity and frequent exploitation in modern web application attacks.
In terms of threat modeling and attack classification, this vulnerability maps directly to the MITRE ATT&CK framework technique T1059, specifically sub-technique 001 (Command and Scripting Interpreter: PHP), as it facilitates remote code execution through script interpretation. It also relates to T1190 (Exploit Public-Facing Application) since the entry point is accessible via standard web protocols without prior authentication. The exploitation typically involves crafting a serialized payload that chains multiple objects together, often referred to as a gadget chain, to achieve the desired outcome such as executing system commands or including malicious files. This technique requires knowledge of the application's class hierarchy and available methods, which can sometimes be gleaned from source code leaks or default configurations common in WordPress plugins like Yacht Rental.
To mitigate this vulnerability, immediate action is required by upgrading the Yacht Rental plugin to a version greater than 2.6 where the issue has been addressed by developers through input validation and safe deserialization practices. If an upgrade is not immediately feasible, administrators should implement strict access controls using web application firewalls (WAF) to block requests containing suspicious serialized data patterns or specific PHP function calls associated with exploitation attempts. Additionally, disabling file inclusion functions in php.ini can reduce the impact of certain object injection payloads that rely on include() or require(). Regular security audits and code reviews focusing on deserialization points are essential for maintaining robust application security posture. Organizations should also ensure they have incident response plans ready to detect signs of compromise such as unusual outbound network traffic, unexpected file modifications in web directories, or anomalous database queries indicative of exploitation activity.