ThemeREX Greeny Deserialization Bug CVE-2026-93940 Forces Patch for Versions Up to 2.10.0

The National Vulnerability Database recorded CVE-2026-93940 as a critical security flaw within the ThemeREX Group Greeny WordPress theme. The issue allows for object injection through the deserialization of untrusted data. According to the NVD record, this vulnerability affects all versions of the Greeny theme from its initial release through version 2.10.0.

What is the technical nature of this vulnerability?

The flaw is classified under CWE-502, which denotes the deserialization of untrusted data. This weakness permits an attacker to inject objects into the application process. The National Vulnerability Database describes the specific issue as allowing object injection within the ThemeREX Group Greeny software. This type of vulnerability often leads to remote code execution if the serialized data is processed without proper validation or integrity checks.

How severe is the risk to organizations?

The Common Vulnerability Scoring System rates this issue at 9.8, which is considered critical. This high score indicates that the vulnerability is easily exploitable and could have a devastating impact on system confidentiality, integrity, and availability. Security operations teams must treat this as a high-priority threat because the attack surface includes any instance running the affected versions of the theme.

Which software versions are impacted by CVE-2026-93940?

The NVD record specifies that the vulnerability affects the ThemeREX Group Greeny theme from version n/a through 2.10.0. This means that any organization using version 2.10.0 or any earlier release of the Greeny theme is potentially exposed to object injection attacks. There is no mention of a patched version in the current source material, leaving users of these versions at risk until a fix is confirmed by the vendor.

What should security teams do next?

Organizations should immediately audit their WordPress installations to identify if they are using the Greeny theme. If the theme is present, teams must verify the version number against the affected range. Until a vendor update is available, monitoring for unusual deserialization attempts or object injection patterns is recommended. Isolating affected environments can help limit potential damage while a permanent solution is sought.

Background: Attack surface

Attack surface analysis is the process of identifying every digital interface where an attacker might interact with your systems. It goes beyond traditional vulnerability scanning to map external-facing assets, shadow IT, and exposed APIs. This method helps you prioritize risks by understanding how these interfaces connect to critical data.

Read the full guide: Attack Surface Analysis: Map Hidden Entry Points Before Exploitation

What to do and how to stay safe: ThemeREX

• Inventory all WordPress installations to check for the presence of the ThemeREX Greeny theme.
• Verify the version number of the theme to determine if it is 2.10.0 or earlier.
• Monitor server logs for signs of deserialization attacks or unexpected object injection activities.
• Restrict access to administrative interfaces of affected sites to reduce the attack surface.

Step-by-step guide: Vulnerability Scanning: What It Finds and What It Misses

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

Frequently asked questions

What is the CVSS score for CVE-2026-93940?

The CVSS score for CVE-2026-93940 is 9.8, which is rated as critical.

Which versions of the Greeny theme are affected?

All versions of the ThemeREX Group Greeny theme from n/a through 2.10.0 are affected.

What type of vulnerability is this?

It is a deserialization of untrusted data vulnerability (CWE-502) that allows object injection.