CVE-2026-78286 CRITICAL

CVE-2026-78286: WordPress Geo Controller plugin <= 8.9.8 - PHP Object Injection vulnerability

Vendor Infinitum Form
Product Geo Controller
Weakness CWE-502 · Unsafe deserialization
Published August 27, 2026
Last update August 27, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated PHP Object Injection in Geo Controller <= 8.9.8 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Geo Controller versions up to 8.9.8 contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the server. The flaw exists in how the application processes untrusted serialized data without proper validation. An attacker can exploit this remotely over the network without any user interaction or authentication.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server, read/modify all data, or take the site offline.

Potential impact on your site

04Site Impact

Complete compromise of the server and all data hosted on it if Geo Controller is internet-facing.

Conditions required to exploit

05Prerequisites

Network access to the vulnerable Geo Controller instance; no authentication required.

Key dates

06Disclosure timeline

August 27, 2026 CVE published