Update ThemeREX Partiso to 1.1.13+ to Fix Critical CVE-2026-93934 Deserialization Flaw

System administrators must immediately review their WordPress installations for the ThemeREX Partiso theme. A newly disclosed critical vulnerability allows remote attackers to inject objects into the application. This flaw enables the deserialization of untrusted data, which can lead to full system compromise. The issue affects all versions of Partiso up to and including version 1.1.13.

In plain English

The vulnerability, tracked as CVE-2026-93934, is rated 9.8 on the CVSS scale by the National Vulnerability Database. This score indicates a critical severity level. The flaw allows an attacker to send specially crafted data to the website. The application then processes this data without proper validation. This process is known as deserialization of untrusted data, categorized under CWE-502.

When an application deserializes data it does not trust, it can execute arbitrary code. In this case, the object injection flaw bypasses normal security controls. Attackers can potentially take over the server hosting the WordPress site. They can also steal sensitive data or modify website content. The risk is high because the vulnerability can be exploited remotely.

The background

ThemeREX Group developed the Partiso theme for WordPress websites. The theme is used by various organizations for their online presence. The National Vulnerability Database record specifies that the issue exists in versions from n/a through 1.1.13. This means any installation running version 1.1.13 or older is vulnerable.

The CVE-2026-93934 identifier was assigned to track this specific security flaw. The description highlights the object injection capability. This type of vulnerability is particularly dangerous in web applications. It often leads to remote code execution scenarios. Administrators must treat this as an urgent priority.

What changes now

Security teams need to audit their WordPress environments immediately. They must identify any sites using the Partiso theme. If the theme is present, they must check the version number. Any version at or below 1.1.13 requires immediate attention. The goal is to prevent attackers from exploiting the deserialization flaw.

There is no confirmed patch mentioned in the current source material. Administrators should monitor ThemeREX Group for official updates. In the meantime, restricting access to vulnerable endpoints may help. However, the primary defense is updating to a fixed version. Until then, the risk remains active on exposed systems.

What to do and how to stay safe: ThemeREX

• Scan your WordPress installations to identify if the Partiso theme is installed.
• Check the version number of Partiso to see if it is 1.1.13 or older.
• Monitor vendor communications for a security update to address CVE-2026-93934.
• Restrict administrative access to reduce the attack surface while waiting for a fix.

Step-by-step guide: Risk-Based Vulnerability Management: Benefits, Limits, and Reality

General security guidance from the Vector Update newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

What is CVE-2026-93934?

It is a critical vulnerability in the ThemeREX Partiso theme that allows object injection through deserialization of untrusted data.

Which versions of Partiso are affected?

The vulnerability affects Partiso versions from n/a through 1.1.13, according to the National Vulnerability Database record.

How severe is this vulnerability?

The CVSS score is 9.8, which is rated as Critical, indicating a high risk of exploitation and impact.