Deserialization of Untrusted Data in ThemeREX Rosalinda

Executive Summary

CVE-2026-93933 is a Deserialization of Untrusted Data vulnerability in the ThemeREX Group Rosalinda theme. It allows Object Injection, meaning attackers can manipulate data processing to execute harmful server actions without authentication. The theme versions affected are from n/a through 1.2.4.

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Detection Guidance

Detecting this vulnerability requires checking for the presence of the Rosalinda theme version 1.2.4 or below. Inspect your WordPress installation for the theme folder and examine the version in the style.css file. Use commands like 'grep -r "Version:" /path/to/theme/' to find the version. Additionally, monitor for unusual server activity or unauthorized actions that may indicate exploitation.

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Impact Analysis

This vulnerability has a high CVSS score of 9.8, indicating it is highly dangerous and likely to be exploited in mass campaigns targeting thousands of websites. Attackers can execute harmful actions on the server without needing authentication.

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Compliance Impact

This vulnerability could lead to unauthorized data access or manipulation, which may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information. Unpatched systems risk non-compliance due to potential breaches of confidentiality and integrity.

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Mitigation Strategies

Immediately apply Patchstack's mitigation rule to block attacks until an official fix is released. Update the Rosalinda theme to the latest version if available. Seek assistance from a hosting provider or developer for further protection.

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