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CriticalVulnerabilityCVE-2026-39738updated 30 Oct 2026, 23:26 UTC

FunnelKit Automations plugin for WordPress: unauthenticated object injection flaw

Anyone on the internet can send specially crafted data to this WordPress plugin and potentially run code on the site without logging in. Site owners using the affected version should update right away.

Official, 2 sources
SeverityCriticalCVSS 9.8 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

What happened

An unauthenticated PHP Object Injection vulnerability (unsafe deserialization of untrusted input) affects the FunnelKit Automations plugin for WordPress.

Why it is dangerous: Successful exploitation could let an attacker take control of the website, read or change its data, or install malware, without any login. Any site running the affected plugin version is at risk.

Are you affected?

You are affected if you run the FunnelKit Automations WordPress plugin version 3.8.6.1 or earlier.

FunnelKit Automations <= 3.8.6.1

What to do

  1. Check your installed FunnelKit Automations version in the WordPress plugins screen
  2. Update to a fixed version as soon as the vendor releases one, or check the GitHub advisory for the patched release
  3. If no fix is available yet, deactivate the plugin until it is patched
  4. Review the site for unexpected admin users or modified files if the plugin was exposed

Timeline

  1. 30 Oct 2026, 19:18 UTC
    Publicly disclosed
  2. 30 Oct 2026, 19:18 UTC
    Reported by NVD · NVD
  3. 30 Oct 2026, 19:19 UTC
    Picked up by Zero Radar
  4. 30 Oct 2026, 23:26 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-39738 · GHSA-9cg4-h688-392x
CVSS
9.8 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
30 Oct 2026, 19:18 UTC
On Zero Radar
30 Oct 2026, 19:19 UTC (1 min after disclosure)
Last change
30 Oct 2026, 23:26 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

FunnelKit Automations plugin for WordPress: unauthenticated object injection flaw · Zero Radar