CVE-2026-6663 GWD Connect <= 2.9 - Unauthenticated Limited Code Execution via update_agent
Unauthenticated attackers can execute arbitrary code on unregistered GWD Connect installations due to missing authorization checks in default configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6663?
CVE-2026-6663 is a medium-severity missing authorization vulnerability in thewebsitesupply GWD Conex, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-6663?
How do I fix CVE-2026-6663?
No fix has been published for CVE-2026-6663 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-6663 being exploited?
There is no known exploitation of CVE-2026-6663 in the wild and no public exploit code.
Sources
Also known as GHSA-v3cp-rrhp-98mx.