External risk intelligence

AI Lab Theme Unauthenticated PHP Object Injection Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-42380

An unauthenticated PHP Object Injection vulnerability has been identified in AI Lab, a critical issue that could allow an attacker to inject malicious objects. If reachable, this vulnerability may lead to unauthorized control, sensitive information disclosure, data modification, or service disruption. Confirming the pr

Deserialization

Halo Surface Signal

Likely · external exposure

4Halo Surface Signal

The vulnerability affects a WordPress theme, which is a type of web application component. WordPress sites are frequently deployed as internet-facing web applications, making this component commonly reachable via public network requests.

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns an unauthenticated PHP Object Injection vulnerability affecting a specific AI Lab product. The issue, rated critical, allows for unauthorized control and data compromise if exploited. The primary concern is to confirm whether this product is in use within our environment.

  • Unauthenticated code injection flaw.
  • Potential for significant system compromise.
  • Verify product usage to assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker can reach the vulnerable component over the network without needing any special access. This leads to the injection of malicious PHP objects into the application, which can then be processed by the system. Successful exploitation could allow an attacker to take control of the application.

  • No authentication required.
  • Triggered by unserializing untrusted data.
  • Allows for remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to inject malicious PHP objects into the AI Lab application, potentially leading to the disclosure of sensitive information, modification of data, or disruption of service. The impact depends on the specific configurations and the nature of the objects that can be injected, especially when the application processes user-supplied input without proper validation.

  • Affects application data and integrity.
  • Via unauthenticated network requests.
  • Leads to code execution or data compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This unauthenticated PHP object injection vulnerability in AI Lab affects web applications, likely managed by platform or application owners. The initial focus should be on identifying all instances of the affected technology, assessing their exposure and business criticality, and locating the system's accountable owner to prioritize remediation efforts.

  • Identify application owners and systems.
  • Verify network exposure and business impact.
  • Plan remediation based on identified risk.

Supplementary metadata

PCI scan relevance

Yes

CVE-2026-42380 — Halo PCI Relevance: Yes. Under typical PCI ASV external scan criteria, this issue may be flagged for scan prioritization.

This PHP Object Injection vulnerability has a high CVSS score and can lead to code execution, which would likely cause a PCI ASV scan to fail.

Scan-prioritization guidance only—not a PCI DSS certification or ASV attestation.

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.

Frequently asked questions

What is the AI Lab product affected by CVE-2026-42380?

AI Lab is a WordPress theme. WordPress themes are collections of files that determine the visual layout and core functionality of a website. This specific software component is used by developers and site administrators to build and manage the interface and features of web applications powered by the WordPress content management system.

What does PHP Object Injection mean for this vulnerability?

This vulnerability falls under the weakness class CWE-502, which concerns deserialization of untrusted data. In plain English, the application takes complex data provided by a user and converts it back into a PHP object without properly checking if the input is safe. An attacker can craft this malicious data to trick the application into performing unintended actions, potentially leading to full control over the affected site.

How is this vulnerability triggered?

The flaw is triggered when the application processes untrusted input through an insecure unserialization process. Importantly, this does not require an attacker to have a valid user account or password. Simply sending a specially crafted network request to the application is enough to initiate the vulnerable process. Validated or internal data that is not sourced from external user input does not trigger this specific issue.

Is my site at risk according to Halo Surface Signal?

Halo Surface Signal labels this as Likely to be relevant because the vulnerability exists in a WordPress theme. Since WordPress sites are typically designed as internet-facing web applications, the vulnerable component is often directly reachable via public network requests. If your instance is accessible from the internet, it is more susceptible to the unauthenticated network traffic that triggers this flaw.

What should I do if I run AI Lab?

Your first step is to confirm if your environment uses the affected versions of the AI Lab theme. Once identified, locate the accountable owner for the system to understand its business impact. Prioritize checking for available updates that address the vulnerability and coordinate with your technical team to apply those fixes as soon as they are provided by the vendor to prevent unauthorized access.

References