CVE-2026-96344 in eCommerce Product Catalog Plugin
Summary
by MITRE • 09/30/2026
Custom role PHP Object Injection in eCommerce Product Catalog <= 3.6.0 versions.
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified as Custom Role PHP Object Injection within the eCommerce Product Catalog plugin, specifically affecting versions up to and including 3.6.0, represents a critical security flaw rooted in improper handling of user-supplied input during object deserialization processes. This type of vulnerability arises when an application accepts serialized data from untrusted sources without adequate validation or sanitization before passing it to PHP's unserialize function. In the context of this plugin, the flaw is likely triggered through custom role configuration parameters where administrators or potentially authenticated users with lower privileges can inject crafted payloads into fields that are subsequently processed by the backend logic. The core technical issue lies in the lack of strict type checking and allow-listing mechanisms for object properties, allowing attackers to manipulate the internal state of PHP objects instantiated during the plugin's execution flow.
From a technical perspective, this vulnerability falls under CWE-502, which denotes Deserialization of Untrusted Data. When an attacker successfully injects a malicious serialized string containing references to vulnerable classes within the WordPress environment or associated libraries, they can exploit gadget chains—sequences of methods that perform dangerous actions such as arbitrary file writes, remote code execution, or database manipulation. The PHP engine will automatically invoke specific magic methods like __wakeup(), __destruct(), or __toString() upon deserialization if these are defined in the targeted classes. If any class within the plugin's dependency tree contains a method that executes system commands, interacts with the filesystem, or performs SQL queries based on object properties set during deserialization, the attacker gains significant control over the server environment. This is particularly dangerous because it bypasses standard authentication checks if the injection point allows access by contributors or subscribers, although typically such high-impact vulnerabilities require at least subscriber-level access to trigger depending on how the custom role functionality is implemented.
The operational impact of this vulnerability is severe and multifaceted. Successful exploitation can lead to complete compromise of the WordPress installation hosting the eCommerce store. Attackers may achieve Remote Code Execution (RCE), allowing them to execute arbitrary system commands, upload web shells for persistent access, or exfiltrate sensitive customer data including credit card information stored in the database. Beyond direct server control, this vulnerability undermines the integrity and confidentiality guarantees expected of an e-commerce platform. It can also be leveraged as a stepping stone for further attacks within the network, such as lateral movement to other servers hosting related services like payment gateways or inventory management systems. The presence of custom role functionality suggests that the plugin manages user permissions extensively; therefore, exploiting this flaw could allow privilege escalation, enabling low-privileged users to assume administrator roles and gain full control over site settings, plugins, and themes without authorization.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary and most effective solution is to upgrade the eCommerce Product Catalog plugin to a version later than 3.6.0 where this vulnerability has been patched by implementing strict input validation and avoiding direct deserialization of user-controlled data. If upgrading is not immediately feasible, administrators should restrict access to any endpoints or parameters associated with custom role configurations using server-side firewall rules or Web Application Firewall (WAF) signatures that detect common PHP object injection patterns such as O: followed by class names in POST requests. Additionally, enabling strict type checking and implementing allow-lists for expected input formats can prevent malformed serialized strings from being processed. From a broader security posture perspective, organizations should adhere to OWASP guidelines on deserialization risks, ensuring that all third-party plugins undergo rigorous code review focusing on data flow analysis to identify unsafe deserialization points before deployment in production environments.
This vulnerability aligns with MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter: PHP, as it facilitates the execution of malicious scripts via object manipulation. It also relates to T1136, Create Account, if used for privilege escalation through role modification, and potentially T1078, Valid Accounts, by exploiting legitimate administrative functions with injected payloads. Security teams should monitor server logs for unusual spikes in PHP errors or unexpected file modifications that might indicate exploitation attempts. Regular vulnerability scanning focused on known vulnerable versions of popular WordPress plugins is essential to detect such exposures early. Furthermore, implementing least-privilege principles ensures that even if an injection occurs, the potential blast radius is contained by limiting what actions low-level users can perform within the application interface.