External risk intelligence

UNIVERSAM universam-demo Untrusted Data Deserialization Leading to Object Injection

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-60238

The vulnerability affects a WordPress plugin. WordPress plugins are commonly deployed as part of public-facing web applications, making them reachable via the internet as part of the standard web server surface.

Deserialization

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in the universam-demo software, allowing for the injection of malicious code. This type of flaw, known as deserialization of untrusted data, means that if the software processes data from an unreliable source, an attacker could potentially execute commands or alter its behavior. The main concern is to confirm if our organization uses this specific software and if so, to what extent it is exposed.

It allows untrusted data to run code.
Critical flaw impacts public-facing systems.
Confirm usage and exposure to this software.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending a specially crafted request to a vulnerable instance of the universam-demo component. This could allow an attacker to inject malicious objects into the application, potentially leading to unauthorized data access, modification, or system compromise.

No authentication or special access required.
Triggered by sending a crafted request.
Enables object injection and compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to inject arbitrary objects into the system when interacting with the universam-demo application. This could lead to the execution of malicious code, potentially impacting the confidentiality, integrity, and availability of the application and its underlying data.

System data integrity and availability.
Malicious object injection via network.
Complete system compromise possible.

Operational Fix

Recommended remediation, mitigation, and detection steps

This deserialization vulnerability in the universam plugin requires immediate attention from teams managing web applications and their associated plugins. The first step is to identify all instances of the affected plugin, determine their exposure to the internet, assess their business criticality, and locate the accountable application or platform owner to initiate a coordinated remediation effort.

Identify plugin instances and owners.
Verify public exposure and business impact.
Plan targeted remediation with owners.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the universam-demo software?

UNIVERSAM universam-demo is a plugin designed for the WordPress platform. WordPress plugins extend the core functionality of a website, enabling additional features or site management tools. This specific component is used within WordPress environments, which are commonly deployed to host web content and applications.

What does deserialization of untrusted data mean for CVE-2025-60238?

This vulnerability, classified as CWE-502, occurs when the software takes data from an outside source and reconstructs it into a complex object without proper validation. Because the plugin blindly trusts this incoming information, an attacker can supply a specially crafted object that forces the application to execute unintended commands or alter its internal logic during the reconstruction process.

How is this vulnerability triggered?

An attacker triggers this flaw by sending a specifically formatted network request to the vulnerable plugin. This process does not require the attacker to have a user account, administrative privileges, or any prior access to the system. Simply interacting with the plugin via a crafted request is sufficient to initiate the malicious object injection.

Do I need to worry if my instance is not internet-facing?

Halo Surface Signal notes that because this is a WordPress plugin, it is typically part of a web application designed to be reachable over the internet. While public-facing instances are the primary concern, you should still evaluate your infrastructure. If your instance is strictly internal, the attack surface is reduced, but it remains a potential vector for any user with network access to that web server.

How should I respond to CVE-2025-60238?

Start by auditing your environment to locate all active installations of the universam-demo plugin. Once identified, verify if the installed version falls within the vulnerable range. Coordinate with the application owners to assess the business impact of these instances and prepare to apply updates or disable the component if a fix is available and necessary to protect your data.

References

patchstack.com/database/Wordpress/Plugin/universam-demo/vulnerabilit…

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.