Geo Controller <= 8.9.8 - Unauthenticated PHP Object Injection

8.1
Deserialization of Untrusted Data
CVE CVE-2026-78286
CVSS 8.1 (High)
Publicly Published August 25, 2026
Last Updated September 1, 2026
Researcher Supakiad S. (m3ez) - E-CQURITY (Thailand)

Description

The Geo Controller plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 8.9.8. This is due to deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

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Vulnerability Details for Geo Controller

Software Type Plugin
Software Slug cf-geoplugin (view on wordpress.org)
Patched? Yes
Remediation Update to version 8.9.9, or a newer patched version
Affected Version
  • <= 8.9.8
Patched Version
  • 8.9.9

Recent vulnerabilities in Geo Controller

# Title CVE ID CVSS Researchers Date
1 Geo Controller <= 8.9.5 - Unauthenticated Information Exposure CVE-2025-62109 5.3 Nabil Irawan December 8, 2025
2 Geo Controller <= 8.7.3 - Missing Authorization to Authenticated (Subscriber+) Menu Creation/Deletion CVE-2024-7380 4.3 Lucio Sá September 4, 2024
3 Geo Controller <= 8.6.9 - Missing Authorization to Unauthenticated Shortcode Execution CVE-2024-7381 5.3 Lucio Sá September 4, 2024
4 Geo Controller <= 8.6.4 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2024-30451 6.4 LVT-tholv2k March 28, 2024
5 Geo Controller <= 8.6.4 - Unauthenticated PHP Object Injection via shortcode REST API Route CVE-2024-3591 8.8 fuyoumingyan February 10, 2024
6 Geo Controller <= 8.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2023-51513 6.4 Ngô Thiên An (ancorn_) October 4, 2023
7 WordPress Geolocation Plugin – CF Geo Plugin <= 7.13.11 - Reflected Cross-Site Scripting 6.1 WPScanTeam August 31, 2021

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