ThemeREX Smash Object Injection Vulnerability

Executive Summary

CVE-2026-93931 is a Deserialization of Untrusted Data vulnerability in the ThemeREX Group Smash WordPress theme. It allows attackers to perform Object Injection attacks due to improper handling of serialized data. This flaw exists in versions up to 1.12.0 and enables remote code execution without authentication.

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Detection Guidance

Detecting this vulnerability requires checking if the Smash theme version 1.12.0 or lower is installed on your WordPress site. You can do this by inspecting the theme files or using WordPress admin panel to view the theme version. No specific commands are provided in the resources, but monitoring for unusual server behavior or unauthorized data processing may indicate exploitation.

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Impact Analysis

This vulnerability can allow attackers to take full control of your website, modify data, inject malicious code, or perform unauthorized actions. Since it requires no authentication, it poses a high risk for mass exploitation across many websites. Attackers could steal sensitive data or deface your site.

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Compliance Impact

This vulnerability could lead to data breaches, exposing personal or sensitive information. Such breaches may violate GDPR, HIPAA, or other regulations, resulting in legal penalties, fines, and reputational damage. Immediate mitigation is required to maintain compliance.

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Mitigation Strategies

Immediately apply Patchstack's mitigation rule to block attacks until an official patch is released. Update the Smash theme to the latest version if available. If no update exists, seek assistance from a hosting provider or developer. Consider disabling the theme temporarily if updates are not feasible.

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