Critical Deserialization Flaw Found in ThemeREX Rosalinda WordPress Theme
A CVSS 9.8 vulnerability in the Rosalinda theme allows object injection, affecting versions up to 1.2.4 according to the National Vulnerability Database.
Key points
- CVE-2026-93933 is rated Critical with a CVSS score of 9.8.
- The flaw involves deserialization of untrusted data in the Rosalinda theme.
- All versions of Rosalinda up to and including 1.2.4 are affected by this issue.
The National Vulnerability Database (NVD) has published a record for CVE-2026-93933, a critical security vulnerability in the Rosalinda WordPress theme developed by ThemeREX Group. This flaw allows for object injection through the deserialization of untrusted data, posing a significant risk to websites using the software.
At a glance
- CVE
- CVE-2026-93933
- Product
- ThemeREX Group Rosalinda
- CVSS
- 9.8 Critical
- Weakness
- insecure deserialization
- Exploited
- No known exploitation
The vulnerability is assigned a CVSS score of 9.8, which the NVD classifies as Critical. This high severity rating reflects the potential for an attacker to exploit the weakness without prior authentication or user interaction. The underlying weakness is identified as CWE-502, which relates to the deserialization of untrusted data.
Context and Background
Deserialization vulnerabilities occur when an application processes serialized data from an untrusted source without proper validation. In this case, the Rosalinda theme fails to adequately verify the integrity of the data it deserializes. This oversight allows an attacker to inject malicious objects into the application's memory space.
According to the NVD record, this specific issue enables object injection. Attackers can potentially execute arbitrary code or manipulate application behavior by crafting malicious serialized data. The lack of validation makes the system susceptible to remote exploitation, which can lead to complete compromise of the affected website.
Who Is Affected
The vulnerability affects the Rosalinda theme by ThemeREX Group. Specifically, all versions of the theme from its initial release through version 1.2.4 are vulnerable to this exploit. Users running any of these versions are exposed to the risk of object injection attacks.
ThemeREX Group is a known developer of WordPress themes and plugins. The Rosalinda theme is one of their products that has been identified with this critical flaw. Website administrators who have installed Rosalinda up to version 1.2.4 should assume their systems are at risk until a patch is confirmed.
What should you do?
Security professionals should immediately audit their WordPress installations to check for the presence of the Rosalinda theme. If the theme is installed, they must verify the version number to determine if it falls within the affected range. Monitoring server logs for unusual activity related to deserialization or object injection is also recommended.
What to do and how to stay safe: CVE-2026-93933
- Inventory all WordPress sites to identify any installations of the ThemeREX Group Rosalinda theme.
- Check the current version of the Rosalinda theme to see if it is 1.2.4 or lower.
- Monitor server logs and web application firewall alerts for signs of object injection attempts.
- Once the vendor provides an update, apply the patch immediately to mitigate the critical risk.
Step-by-step guide: Risk Based Vulnerability Management: Prioritize Fixes by Actual Threat
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is the CVSS score for CVE-2026-93933?
The CVSS score is 9.8, which is classified as Critical by the National Vulnerability Database.
Which versions of Rosalinda are affected?
All versions of the Rosalinda theme from its initial release through version 1.2.4 are affected.
What type of vulnerability is this?
It is a deserialization of untrusted data vulnerability that allows for object injection.
