CVE-2026-95534 in Unlimited Elements Plugin
Summary
by MITRE • 10/07/2026
Deserialization of Untrusted Data vulnerability in Unlimited Elements Unlimited Elements For Elementor (Free Widgets, Addons, Templates) allows Object Injection.
This issue affects Unlimited Elements For Elementor (Free Widgets, Addons, Templates): from n/a through 2.0.19.
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a deserialization of untrusted data flaw within the Unlimited Elements plugin for WordPress represents a critical security risk that enables object injection attacks. This specific issue affects versions ranging from the initial release up to version 2.0.19, impacting both free widgets and addons provided by the developer. The core technical deficiency lies in the application's handling of serialized PHP data structures received from external sources without adequate validation or sanitization mechanisms. When an attacker supplies maliciously crafted input that mimics legitimate serialized objects, the underlying PHP engine attempts to deserialize this data into executable object instances. This process bypasses standard security controls because the deserialization routine does not verify the integrity or origin of the incoming payload, allowing attackers to instantiate arbitrary classes with controlled properties.
From a technical perspective, this flaw aligns directly with CWE-502, which describes Deserialization of Untrusted Data as a weakness where an application reconstructs objects from data provided by users without sufficient checks for validity and trustworthiness. In the context of WordPress plugins like Unlimited Elements, such vulnerabilities often arise when developers use functions like unserialize() on user-supplied input stored in post meta fields or passed via GET/POST parameters. The absence of a whitelist mechanism to restrict which classes can be instantiated during deserialization allows an attacker to exploit gadget chains present within the plugin itself or other loaded WordPress core files and third-party libraries. These gadget chains are sequences of existing code that, when triggered through object property manipulation, lead to unintended side effects such as arbitrary file writes, remote command execution, or privilege escalation.
The operational impact of this vulnerability is severe due to its potential for Remote Code Execution (RCE). An authenticated attacker with low privileges, such as a subscriber or contributor role commonly found in WordPress installations, can exploit this flaw to inject malicious PHP objects into the application's memory space. By carefully crafting these objects, the attacker can trigger methods that execute system commands, read sensitive configuration files containing database credentials, or modify site settings to maintain persistence. This effectively compromises the confidentiality, integrity, and availability of the entire web server environment hosting the WordPress instance. The attack vector is typically classified under ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques like PHP, as it allows for the execution of arbitrary code within the context of the web application process.
Mitigation strategies must focus on immediate remediation through software updates and enhanced input validation practices. The primary recommendation is to upgrade the Unlimited Elements plugin to a version later than 2.0.19 where this vulnerability has been patched by the developers. If an update is not immediately feasible, administrators should implement strict allowlisting for deserialized classes if custom code modifications are possible, ensuring that only expected and safe object types can be instantiated. Additionally, enabling Web Application Firewall (WAF) rules to detect patterns associated with PHP serialization payloads can provide a layer of defense against exploitation attempts. Regular security audits focusing on input handling and the removal of deprecated or unsafe functions like unserialize() in favor of safer alternatives such as JSON decoding for data exchange are essential preventive measures. Organizations should also enforce principle of least privilege by restricting user roles that have access to plugin settings or content creation features, thereby reducing the attack surface available to potential adversaries seeking to leverage this object injection flaw.