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CriticalVulnerabilityCVE-2026-61992updated 29 Oct 2026, 20:04 UTC

GEO my WordPress plugin lets strangers inject malicious PHP objects

A flaw in this WordPress plugin lets people with no login send specially crafted data that the site then trusts, which can lead to a full takeover of the website. Anyone running the affected version should act 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

How the attack works simplified

  1. 1Attacker sends crafted dataNo login needed to reach the plugin
  2. 2Plugin unserializes inputUntrusted data is turned into PHP objects
  3. 3Malicious object runsInjected object triggers code on the server
  4. ResultAttacker may control the website server

What happened

Unauthenticated PHP Object Injection (deserialization of untrusted data) in the GEO my WordPress plugin, versions up to and including 4.5.5.3.

Why it is dangerous: Attackers can potentially run code on the server without any account, so websites and their stored data, including visitor and admin information, are at risk.

Are you affected?

You are affected if you run the GEO my WordPress plugin version 4.5.5.3 or earlier on your WordPress site.

GEO my WordPress <= 4.5.5.3

What to do

  1. Check whether the GEO my WordPress plugin is installed and what version it is
  2. Update to a fixed version as soon as the plugin developer releases one; check the WordPress plugin page or GitHub advisory for updates
  3. If no fix is available yet, deactivate and remove the plugin until it is patched
  4. Review the site for unexpected admin accounts or changed files

Timeline

  1. 29 Oct 2026, 16:18 UTC
    Publicly disclosed
  2. 29 Oct 2026, 16:18 UTC
    Reported by NVD · NVD
  3. 29 Oct 2026, 16:20 UTC
    Picked up by Zero Radar
  4. 29 Oct 2026, 20:04 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-61992 · GHSA-c332-rxr5-p923
CVSS
9.8 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
29 Oct 2026, 16:18 UTC
On Zero Radar
29 Oct 2026, 16:20 UTC (2 min after disclosure)
Last change
29 Oct 2026, 20:04 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

GEO my WordPress plugin lets strangers inject malicious PHP objects · Zero Radar