External risk intelligence

PHP Object Injection in WP Insightly for WordPress Forms

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-49085

An unauthenticated PHP object injection vulnerability affects popular WordPress form plugins, allowing attackers to execute arbitrary code remotely via specially crafted requests. This issue could expose sensitive data or disrupt services if these plugins are in use and reachable externally. It is important to confirm

Deserialization

Halo Surface Signal

Likely · external exposure

4Halo Surface Signal

The vulnerability affects a WordPress plugin designed for form integration. Such plugins are commonly deployed on public-facing web applications to handle user submissions, making them directly reachable from the internet as part of the standard web application surface.

Horizon Alert

Summary of the vulnerability and why it matters

A critical security flaw has been identified in several popular WordPress plugins that handle contact forms. This vulnerability could allow unauthorized access and manipulation of your organization's web applications without any user interaction. The main concern at this time is to confirm if these specific plugins are in use and exposed externally.

  • Unauthenticated PHP object injection flaw.
  • Affects widely used form plugins on WordPress.
  • Confirm usage and external exposure of plugins.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker could exploit this vulnerability by sending a specially crafted request to a website using the affected form plugin. This request would target the plugin's handling of serialized data, allowing the attacker to inject malicious PHP objects. Successful exploitation could lead to arbitrary code execution on the server.

  • No authentication required.
  • Inject malicious PHP objects.
  • Remote code execution.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, unauthenticated PHP Object Injection could affect sensitive information and service behavior in WordPress plugins designed for form integration. This could occur through specially crafted requests when the plugin is used to process form data.

  • Sensitive system and user data could be exposed.
  • Malicious data injection via form submissions.
  • Potential for unauthorized data modification or service disruption.

Operational Fix

Recommended remediation, mitigation, and detection steps

This unauthenticated PHP object injection vulnerability impacts several popular WordPress form plugins, suggesting that application owners and platform teams are likely responsible for managing these plugins. The first practical step is to identify all instances of the affected plugins, determine their reachability and business criticality, and then confirm the accountable owner for remediation planning.

  • Application owners should own the issue.
  • Verify plugin reachability and business impact.
  • Coordinate vendor updates and patch deployment.

Supplementary metadata

PCI scan relevance

Yes

CVE-2026-49085 — Halo PCI Relevance: Yes. Under typical PCI ASV external scan criteria, this issue may be flagged for scan prioritization.

This critical vulnerability allows unauthenticated code injection. The network exploitability and high impact on confidentiality, integrity, and availability make it a significant risk.

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the WP Insightly plugin for WordPress?

WP Insightly for Contact Form 7, WPForms, Elementor, Formidable, and Ninja Forms is a plugin used to integrate WordPress websites with the Insightly CRM. It allows site owners to automatically sync data from popular contact and lead generation forms directly into their CRM to manage customer relationships and contact information.

What does PHP Object Injection mean for CVE-2026-49085?

This vulnerability is classified as CWE-502, which involves deserialization of untrusted data. In plain terms, the plugin fails to safely process serialized PHP data. An attacker can supply a malicious object that the application mistakenly processes as trusted code, potentially leading to unauthorized system behavior or the execution of arbitrary commands on the server hosting the WordPress site.

How can an attacker trigger this vulnerability?

An attacker exploits this by sending a specifically crafted request to the web server that hosts the vulnerable plugin. The bug is triggered when the plugin attempts to unserialize data provided in that request. Simply visiting the site or viewing a form is not enough; the attacker must be able to send malicious input to the plugin's data-processing functions to successfully inject the harmful PHP object.

Is my site at risk if it uses this plugin?

According to Halo Surface Signal, this vulnerability is particularly relevant for public-facing web applications. Since these plugins are designed to handle user-submitted forms on the internet, the affected code paths are typically reachable by anyone, making the system directly accessible for potential exploitation from remote network locations.

What should I do if I run WP Insightly?

Start by performing an inventory of your WordPress installations to locate where these specific plugins are active. Once identified, evaluate the criticality of those sites and their internet exposure. Your primary goal is to confirm which teams manage these assets so they can coordinate the necessary updates or vendor-supplied patches once they become available.

References

Sources and related resources

Primary sources: NVD, CVE.org.

NVDPublished