CVE-2025-39485 CRITICAL

CVE-2025-39485: WordPress GrandTour theme <= 5.6 - PHP Object Injection vulnerability

Vendor Themegoods
Product Grand Tour
Weakness CWE-502 · Unsafe deserialization
Published May 23, 2025
Last update April 28, 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

Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Tour grandtour allows Object Injection.This issue affects Grand Tour: from n/a through <= 5.6.

Explanation of Vulnerability in Simple Terms

02Summary

Grand Tour versions 5.6 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on affected sites. The vulnerability requires no user interaction and can be exploited remotely over the network. Sites running Grand Tour should update immediately to a patched version.

What an attacker can do

03Attacker Capabilities

Run their own code on the site without authentication.

Potential impact on your site

04Site Impact

Complete compromise: attackers can read data, modify content, create accounts, or take full control of the site.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

May 23, 2025 CVE published
April 28, 2026 Record updated