CVE-2026-6663 MEDIUM

CVE-2026-6663: GWD Connect <= 2.9 - Unauthenticated Limited Code Execution via update_agent

Vendor Thewebsitesupply
Product GWD Conex
Weakness CWE-862 · Missing authorization
Published May 12, 2026
Last update May 12, 2026

CVSS base score

4.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The GWD Connect plugin for WordPress is vulnerable to missing authorization to limited code execution in all versions up to, and including, 2.9. This is due to the plugin's standalone agent endpoints (gwd-backup.php and gwd-logs.php) not verifying authentication when the API key has not been configured, which is the default state. This makes it possible for unauthenticated attackers - on unregistered installations only, in certain environments - to execute arbitrary code on the server via the update_agent action, which writes attacker-supplied PHP code to the agent file.

Explanation of Vulnerability in Simple Terms

02Summary

GWD Conex versions 2.9 and earlier lack proper authorization checks, allowing unauthenticated attackers to read and modify limited data via network requests. The vulnerability requires specific conditions to exploit but does not affect system availability. Update to a version newer than 2.9 to remediate.

What an attacker can do

03Attacker Capabilities

Read and modify some data without authentication.

Potential impact on your site

04Site Impact

Unauthorized users may access or alter sensitive information in GWD Conex.

Conditions required to exploit

05Prerequisites

Network access; specific conditions must be met (high attack complexity).

Key dates

06Disclosure timeline

May 12, 2026 CVE published
May 12, 2026 Record updated

Related vulnerabilities

08Related CVE