External risk intelligence

Uncanny Automator Pro PHP Object Injection

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-56057

This vulnerability affects a WordPress plugin. WordPress plugins are commonly deployed as part of public-facing web applications, making the attack surface internet-reachable in typical real-world deployments.

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

This advisory concerns a critical vulnerability in the Uncanny Automator Pro plugin for WordPress, specifically a PHP Object Injection flaw. This type of vulnerability could allow attackers to execute arbitrary code, potentially impacting the confidentiality, integrity, and availability of systems. The primary concern is to confirm if this plugin is in use and, if so, to assess the potential exposure.

A code flaw could let attackers run commands remotely.
This affects a widely used WordPress plugin.
Confirm if the plugin is deployed and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker could reach a vulnerable WordPress plugin from the internet without needing to log in. By sending specially crafted data, they could trigger a PHP object injection vulnerability, potentially allowing them to take control of the affected site.

No authentication required.
Triggered by sending crafted data.
Risk of full site compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary code or access sensitive data on systems running the affected plugin. The attack can occur remotely over the network without any user interaction, potentially leading to a complete compromise of the affected application and its underlying data.

Sensitive data and system access.
Remote code execution via crafted data.
Full application compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This PHP Object Injection vulnerability in Uncanny Automator Pro impacts WordPress sites, likely managed by application owners or platform teams. The first step is to identify all instances of the plugin, determine their internet reachability and business criticality, and locate the accountable owner before planning remediation.

Application owners should lead remediation efforts.
Verify plugin reachability and business criticality.
Plan updates during maintenance windows.

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 Uncanny Automator Pro?

Uncanny Automator Pro is a WordPress plugin used to build automated workflows between different tools and plugins. It acts as a bridge that triggers specific actions based on defined events, helping site administrators reduce manual tasks. Because it integrates deeply with other site components, it manages various data processing functions that must be handled securely.

What does PHP Object Injection mean for CVE-2026-56057?

This vulnerability falls under the CWE-502 weakness class, which involves improper deserialization. In plain English, the software takes untrusted data and turns it back into a PHP object without proper validation. An attacker can manipulate this process to inject malicious objects, which may allow them to execute unauthorized commands or disrupt the normal operation of the plugin.

How can an attacker trigger this vulnerability?

An attacker triggers this flaw by sending specially crafted data to the vulnerable plugin over the network. Because the vulnerability exists within the way the plugin processes input, it does not require the attacker to have an existing account or perform any specific actions on the site beforehand. Simple interactions with the affected plugin's endpoints are sufficient to initiate the exploit.

Is my site at risk if it runs this plugin?

According to Halo Surface Signal, WordPress plugins are frequently used in public-facing web applications. If your instance of Uncanny Automator Pro is reachable over the internet, it is considered external and potentially accessible to anyone. Sites that are internal-only or protected by strictly controlled gateways may have a different risk profile, but public-facing installations face the highest likelihood of remote exploitation.

Do I need to take immediate action?

Yes, start by identifying every instance of Uncanny Automator Pro running in your environment. Once you have a list, verify which sites are internet-facing and determine the business importance of those systems. Locate the teams responsible for these applications and coordinate with them to prioritize testing and applying the official updates provided by the plugin vendor.

References

patchstack.com/database/wordpress/plugin/uncanny-automator-pro/vulne…

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.