CVE-2026-62090 in WineShop Plugin
Summary
by MITRE • 10/10/2026
Unauthenticated PHP Object Injection in WineShop <= 3.20 versions.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as an unauthenticated PHP object injection flaw within WineShop versions up to and including 3.20 represents a critical security deficiency that allows attackers to execute arbitrary code or manipulate application state without valid credentials. This type of vulnerability arises from the improper handling of user-supplied input during the deserialization process, where data is converted back into executable objects. In many PHP-based applications, developers may utilize functions such as unserialize() on inputs derived directly from HTTP requests, cookies, or POST parameters without sufficient validation or sanitization. When an application accepts serialized object strings and passes them to these functions, it creates a pathway for attackers to inject malicious payloads that exploit specific class methods defined within the application's codebase or included libraries.
The technical mechanism behind this flaw typically involves the manipulation of PHP magic methods, such as __wakeup(), __destruct(), or __toString(). These special methods are automatically invoked when an object is created from a serialized string or destroyed. If the underlying classes contain logic that performs dangerous operations—such as file system access, database queries, or execution of shell commands—and these operations rely on properties controlled by the attacker during deserialization, the vulnerability becomes exploitable. In the context of WineShop, which likely manages product catalogs, orders, and user data, an unauthenticated vector means that any internet-facing instance can be targeted without prior login, significantly lowering the barrier to entry for malicious actors. This aligns with CWE-502, Deserialization of Untrusted Data, a category of weaknesses where software fails to validate or verify whether input is from a trusted source before deserializing it.
The operational impact of this vulnerability is severe and multifaceted. Successful exploitation can lead to full remote code execution on the server hosting the application. Attackers may leverage this access to exfiltrate sensitive customer data, including personally identifiable information and payment details stored in the associated database. Furthermore, they might modify product listings, inject malicious scripts into web pages for cross-site scripting attacks against customers, or use the compromised server as a pivot point for further network intrusion. The lack of authentication requirement amplifies the risk, making it highly susceptible to automated scanning tools that constantly probe public-facing services for known vulnerable versions. This scenario is also consistent with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, particularly when PHP scripts are used to execute system commands or interact with other software components on the host machine.
Mitigation strategies must focus on immediate remediation of the codebase and hardening of the deployment environment. The primary fix involves upgrading WineShop to a version greater than 3.20 where this vulnerability has been patched by developers who likely implemented strict input validation, whitelisting allowed classes for deserialization, or replacing unsafe serialization methods with safer alternatives like JSON encoding. For organizations unable to upgrade immediately due to compatibility constraints, implementing an application-level web application firewall can help detect and block malicious serialized payloads based on known patterns associated with PHP object injection attacks. Additionally, ensuring that the server environment restricts file system permissions and disables dangerous PHP functions such as eval(), exec(), or shell_exec() where not strictly necessary can reduce the blast radius of a successful exploitation attempt. Regular security audits and code reviews focusing on data flow analysis are essential to prevent similar deserialization flaws in future development cycles.