CVE-2026-116865 in Zippy Plugin
Summary
by MITRE • 10/29/2026
Editor PHP Object Injection in Zippy <= 1.7.0 versions.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified as an Editor PHP Object Injection flaw within Zippy versions up to and including 1.7.0 represents a critical security deficiency rooted in the improper handling of serialized data inputs by the application's backend logic. This type of attack vector exploits the inherent behavior of PHP’s unserialize function, which can instantiate objects from user-controlled input if not properly sanitized or restricted. In this specific context, the vulnerability likely stems from an endpoint within the Zippy editor component that accepts parameters such as file paths, configuration settings, or metadata without adequate validation before passing them to internal functions responsible for object instantiation. When a malicious actor submits crafted serialized data containing references to arbitrary PHP classes with exploitable magic methods, the application inadvertently deserializes this input, leading to unintended code execution or state manipulation within the server environment.
From a technical perspective, this flaw aligns directly with CWE-502, which describes Deserialization of Untrusted Data. The core issue lies in the assumption that incoming data is safe for immediate processing by PHP’s object unserialization mechanism. Attackers leverage known class structures and available methods within the Zippy application or its dependencies to construct a payload that triggers side effects during deserialization. These side effects may include file system operations, such as reading sensitive configuration files like wp-config.php in WordPress environments where Zippy might be integrated, executing arbitrary shell commands through vulnerable library functions, or performing remote code execution if specific class methods allow it. The absence of strict type checking and the lack of a whitelist approach for allowed classes during deserialization are primary contributors to this vulnerability's existence.
The operational impact of exploiting this PHP Object Injection is severe, potentially resulting in full system compromise depending on the privileges under which the web server process operates. An attacker could use this flaw to bypass authentication mechanisms by manipulating session objects or administrative settings stored as serialized data. Furthermore, it enables unauthorized access to sensitive information residing on the disk, such as database credentials, API keys, and user personal data. In scenarios where Zippy is used for content management or file editing, the ability to inject arbitrary code can lead to persistent backdoors being planted within theme files or plugin directories, facilitating long-term persistence and further lateral movement within the network infrastructure. This vulnerability effectively neutralizes many traditional web application firewalls because it relies on legitimate PHP functionality rather than exploiting protocol-level anomalies.
This incident is also closely associated with MITRE ATT&CK technique T1059, specifically sub-techniques related to command and script interpretation or system scripting interpreter abuse, as the ultimate goal of object injection often culminates in arbitrary code execution. Additionally, it falls under CWE-20 for Improper Input Validation, highlighting the failure to restrict inputs that trigger complex internal behaviors. To mitigate this risk, immediate action is required by upgrading Zippy to a version greater than 1.7.0 where the vendor has presumably patched the deserialization logic. Developers should implement strict input validation and employ allowlists of permitted classes when using unserialize or similar functions. If patching is not immediately feasible, disabling PHP object unserialization for external inputs via configuration changes or implementing custom serialization handlers that do not instantiate arbitrary objects can serve as a temporary defensive measure. Regular security audits focusing on deserialization practices are essential to prevent recurrence and ensure the integrity of the application environment against such sophisticated injection attacks.