Gutentype Plugin Untrusted Data Deserialization Flaw Rated Critical by NVD
The NVD rates CVE-2026-62046 as critical, noting that untrusted data deserialization allows object injection in Gutentype versions up to 2.1.12.
Key points
- The vulnerability is classified as deserialization of untrusted data under CWE-502.
- All versions of the ThemeREX Gutentype plugin up to 2.1.12 are affected.
- The National Vulnerability Database assigns a CVSS score of 9.8 to this issue.
The National Vulnerability Database has published a new record for CVE-2026-62046, identifying a critical security flaw in the Gutentype plugin developed by ThemeREX Group. The issue stems from improper handling of untrusted data during deserialization processes within the application. This defect allows for object injection, a severe weakness that can compromise the integrity and confidentiality of WordPress sites using the software.
Root cause
The underlying technical issue is categorized as CWE-502, which refers to the deserialization of untrusted data. This weakness occurs when an application takes serialized data from an untrusted source and deserializes it without sufficient validation or integrity checks. In the context of the Gutentype plugin, the code fails to verify the origin or structure of the incoming data before processing it. This lack of validation creates a pathway for attackers to inject malicious objects.
Attack path
An attacker exploits this flaw by supplying crafted serialized data to the vulnerable endpoint within the Gutentype plugin. Because the application accepts this data without proper sanitization, it proceeds to deserialize the input. During this process, the injected objects are instantiated within the application’s memory space. This object injection can lead to arbitrary code execution or other severe impacts, depending on the specific objects created and the environment in which they run.
Affected versions
The vulnerability impacts a wide range of software releases. According to the NVD record, the issue affects the Gutentype plugin from its earliest available version through version
What to do and how to stay safe
- Asset discovery is only the first step; context determines risk.
- Internal assets become external risks through cloud misconfigurations.
- Prioritization requires correlating vulnerability data with business criticality.
Attack surface management is continuous, contextual, and human-guided. Start by mapping your external assets and prioritizing risks based on business impact.
Step-by-step guide: Attack Surface Management: 6 Common Misreadings and Correct Views
General security guidance from the NetSec Observer newsroom. It is not confirmed advice from the organisations named in this story.
